Lino Lakes
Clear Sky Chart
History

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

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	12% 9% 3 8% 5% 4 4 4 5% 7% 38%	101847
	Night	12% 9% 4 8% 5% 4 4 4 5% 6% 39%	97972
Transparency	Day	44% 6% 14% 25% 11% 1	105453
	Night	44% 6% 13% 24% 12% 1	102506
Seeing	Day	16% 10% 30% 27% 13% 4	16133
	Night	16% 9% 31% 32% 11% 1	26053

By Month

Percentage Cloud Cover SE (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	10% 18% 8% 16% 5% 4 4 3 4 6% 22%	2527
	11th to 20th	Day	6% 11% 5% 14% 9% 8% 8% 6% 5% 5% 21%	2530
	21st to end	Day	8% 19% 8% 13% 5% 5% 4 3 5% 6% 24%	3117
February	1st to 10th	Day	8% 12% 5% 9% 7% 4 7% 5% 5% 6% 32%	1710
	11th to 20th	Day	8% 11% 5% 10% 6% 6% 5% 4 5% 6% 36%	1664
	21st to end	Day	10% 12% 5% 11% 5% 4 5% 4 5% 7% 32%	1475
March	1st to 10th	Day	11% 11% 3 7% 5% 5% 4 3 5% 7% 39%	3339
	11th to 20th	Day	10% 9% 3 8% 6% 5% 4 3 5% 8% 39%	3480
	21st to end	Day	22% 12% 4 10% 6% 5% 4 3 4 5% 24%	3870
April	1st to 10th	Day	16% 11% 3 6% 5% 4 4 4 6% 7% 34%	2280
	11th to 20th	Day	20% 12% 3 7% 4 5% 4 3 4 5% 32%	2259
	21st to end	Day	21% 12% 3 7% 5% 5% 4 3 4 6% 31%	2470
May	1st to 10th	Day	18% 6% 2 6% 4 4 4 4 5% 7% 40%	4291
	11th to 20th	Day	13% 7% 2 6% 4 4 4 3 6% 7% 45%	4399
	21st to end	Day	16% 8% 3 7% 5% 4 5% 4 6% 7% 35%	4824
June	1st to 10th	Day	12% 5% 2 4 4 4 4 4 7% 8% 46%	2660
	11th to 20th	Day	12% 6% 3 7% 6% 5% 5% 4 7% 9% 37%	2660
	21st to end	Day	10% 5% 1 6% 6% 5% 5% 5% 8% 10% 39%	2660
July	1st to 10th	Day	10% 6% 2 6% 4 5% 6% 5% 8% 10% 37%	4440
	11th to 20th	Day	5% 3 2 3 3 3 3 3 6% 9% 59%	4440
	21st to end	Day	7% 4 2 5% 5% 4 5% 5% 7% 9% 48%	4792
August	1st to 10th	Day	12% 6% 2 6% 4 5% 5% 4 6% 9% 43%	4104
	11th to 20th	Day	12% 5% 2 6% 4 4 4 4 6% 8% 44%	4041
	21st to end	Day	10% 6% 2 7% 4 4 5% 4 5% 7% 46%	4321
September	1st to 10th	Day	11% 5% 2 5% 4 4 5% 3 5% 8% 47%	2280
	11th to 20th	Day	12% 5% 2 5% 4 5% 5% 5% 7% 8% 44%	2265
	21st to end	Day	14% 6% 2 5% 4 4 4 3 6% 6% 45%	1990
October	1st to 10th	Day	16% 7% 2 6% 4 4 4 4 5% 6% 43%	1900
	11th to 20th	Day	14% 11% 3 7% 4 4 5% 3 5% 7% 37%	1900
	21st to end	Day	16% 12% 3 8% 4 3 4 3 5% 5% 37%	2052
November	1st to 10th	Day	11% 13% 4 8% 6% 4 4 4 5% 5% 36%	1646
	11th to 20th	Day	11% 15% 6% 12% 7% 4 3 3 5% 5% 28%	1600
	21st to end	Day	13% 12% 5% 8% 4 5% 4 3 6% 8% 32%	1600
December	1st to 10th	Day	11% 13% 5% 12% 8% 6% 4 4 4 5% 25%	1560
	11th to 20th	Day	10% 14% 8% 12% 6% 5% 5% 3 5% 5% 28%	1918
	21st to end	Day	19% 18% 7% 16% 6% 3 3 2 3 4 19%	2783
January	1st to 10th	Night	10% 16% 7% 14% 5% 4 4 3 5% 5% 27%	4428
	11th to 20th	Night	7% 11% 5% 13% 8% 7% 8% 7% 7% 5% 22%	4440
	21st to end	Night	10% 19% 7% 13% 6% 4 4 3 3 4 26%	4533
February	1st to 10th	Night	6% 12% 5% 10% 7% 5% 5% 3 5% 6% 35%	2470
	11th to 20th	Night	7% 10% 4 8% 6% 6% 5% 4 5% 7% 38%	2403
	21st to end	Night	11% 10% 4 9% 6% 6% 4 4 5% 6% 36%	1978
March	1st to 10th	Night	9% 8% 3 7% 4 4 4 3 5% 8% 46%	3541
	11th to 20th	Night	9% 8% 3 8% 6% 5% 5% 4 7% 7% 40%	3480
	21st to end	Night	25% 11% 3 11% 4 3 2 2 4 4 29%	3760
April	1st to 10th	Night	17% 10% 3 7% 4 4 4 4 4 7% 36%	1900
	11th to 20th	Night	20% 10% 4 7% 5% 3 3 3 5% 5% 36%	1867
	21st to end	Night	18% 10% 3 7% 4 4 4 4 5% 6% 35%	1710
May	1st to 10th	Night	13% 8% 3 8% 5% 4 4 4 5% 5% 42%	2614
	11th to 20th	Night	14% 5% 2 4 3 3 3 3 6% 7% 50%	2506
	21st to end	Night	13% 8% 3 7% 5% 3 4 4 6% 8% 40%	2743
June	1st to 10th	Night	10% 5% 2 5% 4 3 5% 5% 7% 8% 47%	1520
	11th to 20th	Night	8% 6% 2 5% 5% 5% 5% 4 7% 7% 47%	1520
	21st to end	Night	7% 5% 2 5% 4 4 5% 4 7% 8% 51%	1520
July	1st to 10th	Night	11% 4 1 5% 4 4 4 4 7% 9% 47%	2530
	11th to 20th	Night	3 2 2 4 3 3 4 4 7% 9% 58%	2530
	21st to end	Night	4 3 2 4 3 3 4 4 5% 8% 59%	2767
August	1st to 10th	Night	12% 5% 3 7% 4 3 4 3 5% 7% 47%	2836
	11th to 20th	Night	13% 4 1 5% 4 4 3 4 5% 9% 49%	2798
	21st to end	Night	9% 7% 3 6% 4 4 5% 3 6% 7% 46%	3338
September	1st to 10th	Night	8% 4 2 5% 4 4 4 3 6% 7% 53%	1900
	11th to 20th	Night	8% 4 2 4 3 3 4 3 6% 7% 54%	1913
	21st to end	Night	13% 5% 2 5% 4 3 3 3 5% 6% 51%	2171
October	1st to 10th	Night	14% 6% 2 6% 4 3 3 3 5% 6% 49%	2280
	11th to 20th	Night	16% 10% 2 6% 4 4 4 3 4 7% 41%	2280
	21st to end	Night	17% 11% 3 7% 4 3 4 3 5% 6% 37%	2546
November	1st to 10th	Night	13% 10% 4 6% 4 4 4 4 5% 6% 40%	2650
	11th to 20th	Night	13% 12% 4 11% 6% 5% 4 3 4 5% 33%	2800
	21st to end	Night	13% 10% 3 8% 6% 5% 4 3 5% 7% 35%	2800
December	1st to 10th	Night	9% 12% 6% 12% 8% 5% 4 3 5% 6% 30%	2737
	11th to 20th	Night	11% 15% 5% 12% 6% 6% 4 4 5% 6% 26%	3279
	21st to end	Night	21% 16% 6% 12% 5% 4 4 3 4 4 22%	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% 5% 10% 17% 3	2528
	11th to 20th	Day	63% 6% 12% 15% 5%	2530
	21st to end	Day	61% 5% 15% 15% 4	3117
February	1st to 10th	Day	50% 6% 15% 19% 8% 1	1710
	11th to 20th	Day	49% 6% 12% 24% 8% 1	1673
	21st to end	Day	52% 5% 12% 20% 10% 1	1475
March	1st to 10th	Day	44% 6% 15% 25% 10% 1	3339
	11th to 20th	Day	43% 5% 12% 32% 7% 1	3480
	21st to end	Day	63% 5% 9% 18% 5%	3870
April	1st to 10th	Day	49% 5% 12% 21% 12% 1	2280
	11th to 20th	Day	53% 6% 10% 19% 12% 1	2259
	21st to end	Day	54% 5% 12% 19% 9%	2470
May	1st to 10th	Day	41% 7% 13% 25% 13% 2	4330
	11th to 20th	Day	37% 6% 13% 28% 14% 2	4403
	21st to end	Day	45% 8% 13% 23% 10% 1	4837
June	1st to 10th	Day	33% 7% 15% 31% 12% 2	2660
	11th to 20th	Day	42% 7% 15% 22% 13% 1	2660
	21st to end	Day	36% 8% 18% 27% 10% 2	2660
July	1st to 10th	Day	38% 8% 20% 23% 11% 1	4371
	11th to 20th	Day	21% 6% 18% 35% 18% 1	4365
	21st to end	Day	30% 8% 15% 28% 17% 1	4641
August	1st to 10th	Day	37% 6% 13% 30% 12% 2	4090
	11th to 20th	Day	36% 6% 13% 35% 10%	4080
	21st to end	Day	36% 5% 17% 27% 13% 1	4320
September	1st to 10th	Day	35% 5% 14% 33% 12%	2280
	11th to 20th	Day	35% 7% 17% 32% 8%	2265
	21st to end	Day	40% 5% 12% 32% 11%	1990
October	1st to 10th	Day	30% 4 9% 35% 21%	3160
	11th to 20th	Day	40% 5% 12% 27% 16% 1	3140
	21st to end	Day	44% 4 15% 28% 9%	3366
November	1st to 10th	Day	49% 6% 12% 19% 12% 2	1646
	11th to 20th	Day	58% 5% 12% 16% 8% 1	1600
	21st to end	Day	50% 7% 16% 20% 6% 2	1600
December	1st to 10th	Day	60% 6% 15% 14% 5%	1560
	11th to 20th	Day	59% 4 18% 15% 4	1915
	21st to end	Day	70% 5% 9% 11% 5%	2783
January	1st to 10th	Night	59% 5% 13% 18% 6% 1	4428
	11th to 20th	Night	60% 6% 14% 14% 5%	4440
	21st to end	Night	63% 4 9% 19% 5% 1	4533
February	1st to 10th	Night	49% 6% 12% 22% 9% 1	2470
	11th to 20th	Night	44% 6% 15% 25% 9% 1	2404
	21st to end	Night	49% 5% 11% 22% 11% 1	1978
March	1st to 10th	Night	37% 6% 13% 26% 17% 1	3541
	11th to 20th	Night	38% 7% 12% 27% 14% 1	3480
	21st to end	Night	59% 4 9% 20% 7% 1	3760
April	1st to 10th	Night	47% 5% 9% 23% 15% 1	1900
	11th to 20th	Night	50% 5% 9% 20% 14% 3	1867
	21st to end	Night	48% 7% 9% 20% 13% 2	1710
May	1st to 10th	Night	41% 7% 12% 20% 19% 1	2640
	11th to 20th	Night	33% 6% 12% 26% 20% 4	2507
	21st to end	Night	40% 7% 13% 23% 15% 1	2751
June	1st to 10th	Night	31% 8% 14% 28% 17% 2	1520
	11th to 20th	Night	34% 7% 14% 25% 17% 3	1520
	21st to end	Night	28% 6% 17% 30% 15% 3	1520
July	1st to 10th	Night	32% 8% 20% 26% 13% 1	2490
	11th to 20th	Night	20% 6% 15% 37% 19% 2	2482
	21st to end	Night	23% 7% 16% 32% 20% 3	2679
August	1st to 10th	Night	37% 5% 12% 28% 14% 4	2826
	11th to 20th	Night	33% 6% 14% 32% 15% 1	2825
	21st to end	Night	35% 7% 17% 28% 11% 2	3338
September	1st to 10th	Night	29% 6% 15% 32% 17% 1	1900
	11th to 20th	Night	29% 6% 17% 31% 16%	1913
	21st to end	Night	35% 4 12% 32% 15% 1	2171
October	1st to 10th	Night	24% 3 7% 35% 27% 4	3800
	11th to 20th	Night	34% 5% 12% 24% 21% 3	3779
	21st to end	Night	45% 4 12% 27% 12%	4182
November	1st to 10th	Night	44% 6% 12% 24% 13% 1	2650
	11th to 20th	Night	54% 5% 13% 18% 10% 1	2800
	21st to end	Night	49% 6% 16% 22% 6% 1	2800
December	1st to 10th	Night	55% 5% 14% 19% 6%	2737
	11th to 20th	Night	58% 6% 13% 17% 5% 2	3281
	21st to end	Night	65% 4 12% 15% 4	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	14% 9% 35% 27% 11% 3	270
	11th to 20th	Day	18% 10% 39% 27% 5% 1	270
	21st to end	Day	18% 9% 39% 24% 10% 1	297
February	1st to 10th	Day	16% 15% 41% 22% 6%	270
	11th to 20th	Day	16% 17% 40% 21% 4 1	270
	21st to end	Day	15% 15% 40% 28% 2	225
March	1st to 10th	Day	17% 14% 43% 19% 7%	270
	11th to 20th	Day	17% 10% 39% 23% 10% 1	270
	21st to end	Day	26% 13% 29% 21% 8% 2	328
April	1st to 10th	Day	23% 15% 35% 22% 5% 1	460
	11th to 20th	Day	30% 12% 24% 23% 9% 1	457
	21st to end	Day	30% 11% 28% 21% 9% 2	650
May	1st to 10th	Day	21% 15% 28% 25% 9% 1	653
	11th to 20th	Day	19% 11% 29% 24% 13% 3	675
	21st to end	Day	16% 11% 24% 27% 17% 4	734
June	1st to 10th	Day	10% 8% 26% 33% 18% 5%	680
	11th to 20th	Day	14% 8% 34% 32% 10% 3	680
	21st to end	Day	14% 7% 29% 29% 15% 6%	680
July	1st to 10th	Day	9% 4 21% 33% 21% 11%	671
	11th to 20th	Day	10% 5% 26% 31% 20% 8%	668
	21st to end	Day	5% 5% 26% 35% 22% 7%	739
August	1st to 10th	Day	10% 5% 23% 33% 24% 6%	676
	11th to 20th	Day	14% 5% 20% 31% 24% 6%	665
	21st to end	Day	12% 6% 25% 30% 21% 6%	628
September	1st to 10th	Day	15% 6% 26% 30% 19% 4	490
	11th to 20th	Day	13% 5% 27% 30% 21% 4	475
	21st to end	Day	17% 10% 30% 23% 14% 6%	300
October	1st to 10th	Day	17% 11% 29% 23% 15% 5%	300
	11th to 20th	Day	17% 16% 38% 21% 8% 1	300
	21st to end	Day	22% 14% 41% 16% 5% 1	330
November	1st to 10th	Day	21% 11% 35% 24% 8% 2	300
	11th to 20th	Day	19% 18% 37% 21% 5%	300
	21st to end	Day	22% 13% 42% 19% 5%	300
December	1st to 10th	Day	14% 11% 44% 22% 9%	285
	11th to 20th	Day	20% 16% 33% 27% 4	270
	21st to end	Day	27% 15% 34% 22% 2	297
January	1st to 10th	Night	12% 12% 34% 32% 9% 1	950
	11th to 20th	Night	17% 10% 35% 30% 6% 1	950
	21st to end	Night	18% 10% 35% 30% 6% 1	1045
February	1st to 10th	Night	12% 11% 39% 29% 8% 1	950
	11th to 20th	Night	12% 12% 40% 28% 7% 1	929
	21st to end	Night	17% 12% 34% 29% 8%	722
March	1st to 10th	Night	15% 10% 37% 29% 9%	646
	11th to 20th	Night	18% 9% 38% 27% 7%	570
	21st to end	Night	22% 11% 30% 25% 11% 1	627
April	1st to 10th	Night	20% 12% 34% 28% 6%	570
	11th to 20th	Night	23% 10% 31% 29% 7%	563
	21st to end	Night	22% 10% 31% 27% 8% 1	570
May	1st to 10th	Night	19% 11% 34% 29% 6% 1	570
	11th to 20th	Night	16% 8% 32% 32% 11% 1	561
	21st to end	Night	12% 8% 27% 37% 16% 1	617
June	1st to 10th	Night	11% 5% 27% 41% 15%	570
	11th to 20th	Night	10% 4 30% 46% 9%	570
	21st to end	Night	9% 5% 23% 46% 16% 2	570
July	1st to 10th	Night	7% 2 18% 43% 29% 2	555
	11th to 20th	Night	7% 3 24% 44% 21% 1	552
	21st to end	Night	5% 1 24% 46% 21% 2	624
August	1st to 10th	Night	8% 5% 16% 50% 21% 1	567
	11th to 20th	Night	13% 3 18% 35% 29% 2	564
	21st to end	Night	8% 4 24% 40% 23% 2	627
September	1st to 10th	Night	10% 5% 23% 39% 20% 2	570
	11th to 20th	Night	10% 6% 28% 37% 17% 3	570
	21st to end	Night	14% 9% 30% 31% 15% 1	651
October	1st to 10th	Night	18% 8% 28% 32% 13% 1	760
	11th to 20th	Night	21% 9% 32% 29% 8% 1	760
	21st to end	Night	25% 10% 27% 31% 7%	836
November	1st to 10th	Night	19% 11% 31% 31% 7% 1	894
	11th to 20th	Night	18% 13% 35% 26% 7% 1	1000
	21st to end	Night	19% 14% 36% 25% 7%	1000
December	1st to 10th	Night	16% 11% 35% 30% 7% 1	978
	11th to 20th	Night	20% 9% 37% 26% 7%	950
	21st to end	Night	23% 12% 33% 25% 6%	1045

Page generated at 2024-12-03 05:45:09. Version ac07

Copyright © 2024 Attilla Danko.