Ingonish Beach
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Ingonish Beach clear sky chart from 2005-11-06 to 2024-12-09.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	16% 10% 4 9% 6% 5% 5% 4 6% 7% 27%	101907
	Night	16% 10% 3 10% 6% 5% 5% 4 6% 7% 27%	98006
Transparency	Day	54% 10% 13% 16% 6%	105376
	Night	55% 11% 12% 16% 6%	102636
Seeing	Day	22% 14% 29% 24% 9% 1	17826
	Night	24% 15% 28% 24% 8% 1	25194

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	12% 10% 5% 17% 10% 7% 8% 5% 7% 6% 14%	2526
	11th to 20th	Day	9% 13% 5% 16% 9% 7% 8% 5% 7% 6% 15%	2530
	21st to end	Day	10% 8% 6% 15% 11% 7% 6% 6% 7% 7% 19%	2787
February	1st to 10th	Day	13% 12% 3 14% 10% 8% 7% 5% 8% 6% 14%	1710
	11th to 20th	Day	11% 13% 4 11% 9% 6% 6% 6% 7% 7% 20%	1663
	21st to end	Day	6% 12% 5% 12% 7% 6% 5% 5% 5% 7% 28%	1570
March	1st to 10th	Day	16% 13% 4 9% 6% 6% 5% 3 4 5% 29%	3114
	11th to 20th	Day	11% 17% 7% 11% 7% 6% 5% 4 6% 6% 19%	3434
	21st to end	Day	18% 17% 5% 13% 6% 5% 5% 4 5% 6% 16%	4061
April	1st to 10th	Day	17% 13% 4 10% 6% 5% 6% 4 6% 6% 23%	2280
	11th to 20th	Day	18% 10% 3 8% 5% 4 4 3 5% 6% 35%	2254
	21st to end	Day	21% 11% 3 7% 5% 4 4 3 5% 7% 30%	2477
May	1st to 10th	Day	20% 14% 3 7% 4 4 4 3 5% 8% 28%	4425
	11th to 20th	Day	18% 9% 3 8% 5% 5% 5% 3 5% 7% 33%	4398
	21st to end	Day	15% 9% 3 8% 5% 5% 5% 4 7% 8% 32%	4836
June	1st to 10th	Day	25% 9% 3 7% 5% 4 5% 4 6% 7% 25%	2660
	11th to 20th	Day	17% 8% 2 7% 4 5% 4 5% 5% 8% 35%	2660
	21st to end	Day	22% 11% 3 9% 6% 5% 4 4 6% 4 27%	2660
July	1st to 10th	Day	15% 8% 3 8% 5% 5% 6% 4 6% 10% 29%	4440
	11th to 20th	Day	13% 6% 2 7% 6% 6% 6% 4 8% 9% 33%	4440
	21st to end	Day	13% 5% 2 7% 5% 5% 5% 4 6% 9% 39%	4815
August	1st to 10th	Day	15% 6% 3 7% 6% 7% 7% 6% 8% 10% 27%	4424
	11th to 20th	Day	19% 8% 2 7% 4 4 4 4 6% 8% 32%	4058
	21st to end	Day	13% 7% 2 6% 5% 4 5% 4 6% 8% 39%	4180
September	1st to 10th	Day	15% 7% 3 6% 5% 4 5% 4 6% 8% 37%	2280
	11th to 20th	Day	17% 8% 2 6% 5% 5% 5% 3 6% 8% 35%	2268
	21st to end	Day	18% 7% 2 6% 4 3 5% 5% 7% 9% 35%	2047
October	1st to 10th	Day	17% 9% 3 7% 5% 5% 4 3 7% 8% 32%	1900
	11th to 20th	Day	17% 10% 3 8% 6% 5% 6% 4 6% 8% 26%	1900
	21st to end	Day	19% 13% 4 10% 6% 7% 6% 4 5% 5% 21%	1895
November	1st to 10th	Day	17% 15% 5% 10% 6% 6% 5% 4 6% 7% 21%	1742
	11th to 20th	Day	19% 17% 6% 11% 7% 7% 6% 4 5% 5% 14%	1600
	21st to end	Day	16% 15% 5% 10% 7% 7% 5% 5% 8% 8% 14%	1600
December	1st to 10th	Day	18% 15% 6% 14% 7% 8% 6% 4 6% 5% 11%	1584
	11th to 20th	Day	27% 13% 5% 14% 6% 7% 6% 4 5% 6% 8%	1906
	21st to end	Day	20% 14% 8% 13% 8% 6% 6% 4 5% 4 12%	2783
January	1st to 10th	Night	9% 10% 4 19% 9% 6% 8% 6% 8% 10% 13%	4429
	11th to 20th	Night	16% 9% 4 22% 8% 7% 5% 4 6% 6% 12%	4440
	21st to end	Night	9% 9% 5% 14% 13% 6% 7% 6% 7% 8% 17%	4875
February	1st to 10th	Night	13% 11% 4 13% 7% 6% 7% 6% 8% 8% 18%	2470
	11th to 20th	Night	13% 12% 4 9% 8% 7% 6% 5% 6% 8% 23%	2403
	21st to end	Night	8% 11% 5% 9% 8% 6% 6% 5% 6% 8% 28%	1884
March	1st to 10th	Night	15% 12% 4 8% 8% 5% 5% 4 5% 6% 28%	3726
	11th to 20th	Night	15% 16% 4 10% 7% 5% 5% 4 5% 5% 24%	3523
	21st to end	Night	20% 13% 4 12% 6% 5% 5% 4 5% 5% 21%	3571
April	1st to 10th	Night	19% 12% 2 8% 5% 3 5% 4 6% 6% 29%	1900
	11th to 20th	Night	16% 10% 4 7% 4 4 5% 3 5% 7% 36%	1876
	21st to end	Night	21% 11% 2 6% 6% 5% 5% 3 4 5% 32%	1699
May	1st to 10th	Night	20% 10% 3 6% 5% 4 4 4 6% 9% 30%	2525
	11th to 20th	Night	14% 9% 3 6% 3 4 5% 4 6% 8% 39%	2506
	21st to end	Night	13% 8% 3 7% 5% 5% 5% 5% 8% 9% 33%	2749
June	1st to 10th	Night	27% 10% 2 7% 6% 4 5% 4 5% 6% 24%	1520
	11th to 20th	Night	19% 7% 2 6% 3 3 4 3 6% 7% 41%	1520
	21st to end	Night	23% 7% 3 7% 5% 4 4 4 5% 6% 32%	1520
July	1st to 10th	Night	15% 7% 3 9% 6% 6% 6% 4 7% 8% 28%	2530
	11th to 20th	Night	12% 7% 2 7% 5% 5% 5% 4 7% 9% 37%	2530
	21st to end	Night	13% 6% 2 5% 3 4 4 4 7% 7% 44%	2750
August	1st to 10th	Night	11% 5% 3 7% 6% 6% 7% 5% 8% 9% 33%	2516
	11th to 20th	Night	13% 6% 3 7% 4 6% 5% 3 6% 9% 38%	2754
	21st to end	Night	12% 6% 2 5% 3 4 4 4 6% 8% 46%	3476
September	1st to 10th	Night	15% 5% 2 5% 5% 4 4 4 6% 8% 43%	1900
	11th to 20th	Night	18% 6% 1 4 3 4 5% 3 6% 8% 42%	1911
	21st to end	Night	18% 7% 2 6% 4 4 4 4 5% 6% 40%	2131
October	1st to 10th	Night	16% 8% 2 6% 4 5% 6% 4 6% 8% 35%	2280
	11th to 20th	Night	20% 7% 2 7% 5% 4 5% 4 6% 9% 31%	2280
	21st to end	Night	22% 10% 3 7% 6% 6% 5% 4 6% 8% 24%	2703
November	1st to 10th	Night	17% 11% 3 9% 6% 7% 6% 5% 7% 7% 24%	2553
	11th to 20th	Night	21% 12% 4 9% 7% 6% 6% 5% 7% 7% 16%	2800
	21st to end	Night	19% 13% 5% 10% 6% 5% 5% 4 7% 8% 17%	2800
December	1st to 10th	Night	17% 14% 6% 13% 7% 6% 6% 5% 6% 7% 14%	2779
	11th to 20th	Night	25% 14% 6% 12% 6% 5% 5% 4 6% 6% 11%	3293
	21st to end	Night	24% 12% 6% 13% 6% 5% 4 4 4 5% 16%	4884

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	65% 18% 10% 7% 1	2527
	11th to 20th	Day	62% 17% 12% 9% 1	2530
	21st to end	Day	60% 14% 11% 9% 4 1	2787
February	1st to 10th	Day	66% 11% 11% 8% 3	1710
	11th to 20th	Day	58% 15% 13% 10% 3 1	1671
	21st to end	Day	52% 11% 14% 15% 7% 2	1570
March	1st to 10th	Day	56% 7% 9% 17% 10%	3118
	11th to 20th	Day	58% 15% 10% 12% 4	3434
	21st to end	Day	65% 10% 9% 11% 4 1	4061
April	1st to 10th	Day	56% 9% 12% 15% 6% 2	2280
	11th to 20th	Day	49% 8% 12% 20% 11% 1	2254
	21st to end	Day	52% 9% 13% 15% 9% 1	2477
May	1st to 10th	Day	54% 12% 14% 15% 4 1	4440
	11th to 20th	Day	47% 12% 15% 19% 6%	4402
	21st to end	Day	46% 14% 16% 18% 6%	4836
June	1st to 10th	Day	57% 10% 11% 15% 6%	2660
	11th to 20th	Day	47% 10% 14% 20% 9% 1	2660
	21st to end	Day	58% 10% 9% 14% 8% 1	2660
July	1st to 10th	Day	53% 7% 16% 14% 9% 1	4370
	11th to 20th	Day	45% 8% 22% 19% 5% 1	4364
	21st to end	Day	39% 8% 22% 24% 7%	4662
August	1st to 10th	Day	51% 10% 17% 17% 5%	4410
	11th to 20th	Day	48% 7% 16% 24% 5%	4098
	21st to end	Day	41% 7% 14% 27% 10%	4180
September	1st to 10th	Day	41% 11% 16% 22% 10% 1	2280
	11th to 20th	Day	46% 9% 15% 22% 8% 1	2268
	21st to end	Day	43% 11% 14% 22% 9% 1	2047
October	1st to 10th	Day	56% 6% 12% 18% 8%	3160
	11th to 20th	Day	49% 7% 12% 24% 8%	3140
	21st to end	Day	53% 6% 13% 21% 7%	3106
November	1st to 10th	Day	62% 9% 13% 13% 3	1742
	11th to 20th	Day	70% 9% 10% 8% 3	1600
	21st to end	Day	64% 13% 13% 8% 2	1600
December	1st to 10th	Day	74% 11% 7% 7% 1	1584
	11th to 20th	Day	76% 11% 6% 6% 1	1905
	21st to end	Day	69% 15% 8% 6% 2	2783
January	1st to 10th	Night	63% 22% 9% 5% 1	4429
	11th to 20th	Night	70% 17% 7% 4 2	4440
	21st to end	Night	59% 17% 11% 10% 3	4875
February	1st to 10th	Night	63% 12% 11% 10% 4	2470
	11th to 20th	Night	58% 12% 14% 13% 3 1	2406
	21st to end	Night	52% 13% 12% 13% 8% 1	1884
March	1st to 10th	Night	55% 10% 8% 17% 9% 1	3735
	11th to 20th	Night	60% 9% 10% 15% 5%	3524
	21st to end	Night	64% 9% 8% 13% 5% 2	3571
April	1st to 10th	Night	54% 8% 11% 15% 11% 1	1900
	11th to 20th	Night	47% 9% 11% 21% 11% 2	1876
	21st to end	Night	53% 9% 10% 15% 12% 2	1699
May	1st to 10th	Night	50% 13% 15% 15% 6%	2530
	11th to 20th	Night	42% 12% 14% 23% 7% 1	2507
	21st to end	Night	41% 16% 17% 20% 5%	2750
June	1st to 10th	Night	62% 8% 10% 14% 5% 1	1520
	11th to 20th	Night	42% 9% 13% 23% 12% 1	1520
	21st to end	Night	53% 9% 13% 16% 9%	1520
July	1st to 10th	Night	53% 6% 16% 18% 7%	2491
	11th to 20th	Night	44% 9% 21% 17% 9% 1	2482
	21st to end	Night	39% 8% 20% 23% 10%	2663
August	1st to 10th	Night	46% 10% 18% 22% 4	2505
	11th to 20th	Night	45% 8% 20% 23% 4	2779
	21st to end	Night	38% 7% 14% 33% 8%	3475
September	1st to 10th	Night	38% 12% 15% 23% 11%	1900
	11th to 20th	Night	40% 10% 15% 24% 10% 1	1911
	21st to end	Night	44% 10% 13% 24% 8% 1	2131
October	1st to 10th	Night	52% 6% 12% 20% 10%	3800
	11th to 20th	Night	48% 7% 10% 27% 8%	3779
	21st to end	Night	53% 6% 12% 24% 6%	4453
November	1st to 10th	Night	58% 13% 14% 12% 3	2553
	11th to 20th	Night	66% 12% 11% 9% 2	2800
	21st to end	Night	65% 15% 11% 7% 2	2800
December	1st to 10th	Night	70% 12% 7% 9% 1	2779
	11th to 20th	Night	75% 11% 7% 5% 2	3295
	21st to end	Night	72% 11% 10% 6% 1	4884

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	23% 24% 33% 16% 3	370
	11th to 20th	Day	24% 25% 31% 16% 4 1	370
	21st to end	Day	15% 24% 39% 18% 3	407
February	1st to 10th	Day	24% 24% 33% 14% 5%	370
	11th to 20th	Day	20% 30% 33% 16% 2	366
	21st to end	Day	17% 19% 37% 21% 5% 1	307
March	1st to 10th	Day	18% 23% 36% 18% 5% 1	370
	11th to 20th	Day	14% 20% 36% 20% 8% 1	445
	21st to end	Day	24% 20% 31% 16% 6% 2	506
April	1st to 10th	Day	28% 23% 30% 13% 5%	460
	11th to 20th	Day	25% 17% 32% 19% 7%	452
	21st to end	Day	26% 12% 31% 23% 7% 1	560
May	1st to 10th	Day	27% 14% 29% 21% 6% 3	653
	11th to 20th	Day	21% 11% 24% 28% 14% 2	674
	21st to end	Day	19% 13% 33% 27% 8% 1	735
June	1st to 10th	Day	31% 8% 26% 26% 8% 1	680
	11th to 20th	Day	18% 7% 28% 35% 10% 2	680
	21st to end	Day	27% 6% 23% 29% 14% 2	680
July	1st to 10th	Day	21% 5% 24% 36% 13% 1	670
	11th to 20th	Day	16% 5% 23% 41% 13% 1	668
	21st to end	Day	22% 4 22% 35% 16% 1	740
August	1st to 10th	Day	16% 4 21% 39% 19% 1	675
	11th to 20th	Day	19% 6% 24% 29% 19% 4	511
	21st to end	Day	15% 7% 27% 35% 14% 3	539
September	1st to 10th	Day	16% 7% 32% 33% 9% 2	490
	11th to 20th	Day	23% 12% 28% 23% 12% 2	483
	21st to end	Day	21% 10% 32% 23% 13% 1	390
October	1st to 10th	Day	21% 12% 31% 22% 13% 1	390
	11th to 20th	Day	23% 14% 29% 21% 11% 2	390
	21st to end	Day	27% 19% 30% 18% 6%	429
November	1st to 10th	Day	27% 20% 28% 20% 4 2	395
	11th to 20th	Day	33% 19% 29% 15% 4 1	400
	21st to end	Day	32% 23% 25% 17% 3	400
December	1st to 10th	Day	29% 19% 35% 14% 4	394
	11th to 20th	Day	31% 26% 28% 13% 1 1	370
	21st to end	Day	25% 27% 29% 13% 5% 1	407
January	1st to 10th	Night	23% 27% 30% 16% 4	850
	11th to 20th	Night	24% 25% 32% 15% 3	850
	21st to end	Night	18% 23% 36% 18% 5%	931
February	1st to 10th	Night	24% 20% 32% 20% 3	760
	11th to 20th	Night	21% 25% 34% 17% 3	743
	21st to end	Night	15% 19% 33% 25% 7%	628
March	1st to 10th	Night	21% 16% 35% 23% 4 1	760
	11th to 20th	Night	20% 17% 29% 24% 8% 1	760
	21st to end	Night	25% 16% 30% 22% 5% 2	694
April	1st to 10th	Night	26% 16% 29% 22% 6%	570
	11th to 20th	Night	21% 14% 27% 29% 7%	564
	21st to end	Night	26% 11% 29% 22% 10% 1	570
May	1st to 10th	Night	29% 8% 25% 23% 11% 4	570
	11th to 20th	Night	21% 9% 23% 28% 15% 3	562
	21st to end	Night	20% 9% 30% 31% 10% 1	616
June	1st to 10th	Night	32% 8% 25% 28% 6% 1	570
	11th to 20th	Night	22% 5% 24% 33% 14% 2	570
	21st to end	Night	27% 3 23% 35% 10% 2	570
July	1st to 10th	Night	18% 5% 20% 37% 19% 1	556
	11th to 20th	Night	17% 5% 19% 43% 17%	552
	21st to end	Night	23% 3 17% 39% 16% 1	623
August	1st to 10th	Night	17% 2 21% 39% 19% 2	568
	11th to 20th	Night	20% 4 20% 36% 17% 3	562
	21st to end	Night	17% 4 21% 38% 19% 2	627
September	1st to 10th	Night	16% 7% 31% 33% 12% 1	570
	11th to 20th	Night	22% 10% 25% 28% 13% 1	570
	21st to end	Night	23% 11% 28% 28% 9% 1	611
October	1st to 10th	Night	20% 11% 30% 27% 11% 1	760
	11th to 20th	Night	26% 12% 26% 24% 10% 1	760
	21st to end	Night	30% 16% 30% 19% 4 1	939
November	1st to 10th	Night	25% 19% 31% 20% 4 1	880
	11th to 20th	Night	30% 23% 26% 15% 5% 1	900
	21st to end	Night	32% 20% 31% 14% 3	900
December	1st to 10th	Night	29% 22% 30% 14% 5%	893
	11th to 20th	Night	30% 29% 26% 11% 3 1	850
	21st to end	Night	25% 25% 31% 15% 2 1	935

Page generated at 2024-12-06 04:54:46. Version ac07

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