Coshocton
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Coshocton clear sky chart from 2005-11-06 to 2024-11-25.

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% 3 8% 5% 5% 5% 4 6% 7% 32%	100930
	Night	16% 11% 4 8% 5% 4 4 3 5% 6% 34%	98478
Transparency	Day	49% 5% 11% 21% 12% 1	104631
	Night	49% 5% 11% 21% 13% 2	102916
Seeing	Day	22% 12% 27% 21% 12% 5%	14803
	Night	22% 10% 25% 28% 14% 2	25099

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	20% 21% 5% 11% 5% 4 4 3 4 6% 18%	2836
	11th to 20th	Day	15% 22% 8% 13% 5% 5% 4 3 4 5% 16%	2840
	21st to end	Day	27% 22% 7% 10% 6% 3 3 2 4 3 12%	3124
February	1st to 10th	Day	20% 18% 5% 9% 6% 4 3 3 4 4 24%	1710
	11th to 20th	Day	16% 15% 5% 12% 6% 4 4 2 5% 6% 25%	1757
	21st to end	Day	18% 15% 5% 10% 5% 4 3 2 3 5% 30%	1570
March	1st to 10th	Day	23% 15% 4 8% 5% 4 4 3 4 5% 25%	3344
	11th to 20th	Day	13% 10% 3 8% 6% 5% 4 3 4 6% 36%	3480
	21st to end	Day	22% 9% 4 8% 4 4 4 3 4 6% 33%	3815
April	1st to 10th	Day	16% 13% 4 8% 5% 4 4 3 5% 6% 32%	2099
	11th to 20th	Day	18% 10% 2 6% 5% 5% 5% 3 5% 7% 35%	2413
	21st to end	Day	19% 8% 3 8% 5% 5% 5% 4 5% 6% 32%	2470
May	1st to 10th	Day	22% 11% 3 7% 5% 5% 5% 4 5% 6% 28%	4082
	11th to 20th	Day	21% 8% 3 6% 5% 4 4 3 5% 6% 34%	4081
	21st to end	Day	12% 6% 3 7% 5% 5% 5% 5% 7% 10% 36%	4476
June	1st to 10th	Day	11% 7% 2 7% 6% 5% 6% 5% 6% 8% 36%	2470
	11th to 20th	Day	12% 6% 3 7% 6% 5% 6% 4 7% 9% 35%	2470
	21st to end	Day	12% 6% 2 5% 5% 5% 5% 5% 9% 10% 36%	2470
July	1st to 10th	Day	10% 7% 3 7% 6% 6% 5% 4 7% 9% 38%	4120
	11th to 20th	Day	9% 5% 2 6% 5% 5% 5% 4 8% 10% 41%	4120
	21st to end	Day	12% 7% 3 7% 5% 5% 6% 5% 7% 9% 35%	4466
August	1st to 10th	Day	11% 7% 2 7% 5% 6% 6% 5% 7% 10% 33%	4104
	11th to 20th	Day	9% 6% 2 8% 5% 5% 6% 5% 8% 10% 36%	4044
	21st to end	Day	6% 5% 2 6% 4 5% 5% 5% 7% 10% 45%	4452
September	1st to 10th	Day	14% 6% 2 6% 4 3 4 3 5% 7% 46%	2138
	11th to 20th	Day	10% 5% 2 6% 4 4 5% 3 7% 9% 44%	2090
	21st to end	Day	21% 7% 2 7% 4 4 4 3 4 6% 39%	2090
October	1st to 10th	Day	14% 7% 2 6% 4 4 4 4 6% 6% 43%	1985
	11th to 20th	Day	15% 8% 3 8% 4 4 5% 4 5% 6% 38%	1900
	21st to end	Day	21% 10% 3 6% 4 4 4 3 5% 5% 35%	2090
November	1st to 10th	Day	11% 8% 3 7% 5% 3 3 3 6% 6% 45%	1767
	11th to 20th	Day	18% 13% 3 8% 5% 3 4 3 4 5% 33%	1800
	21st to end	Day	19% 14% 5% 8% 5% 4 3 3 5% 5% 29%	1662
December	1st to 10th	Day	21% 18% 6% 10% 5% 4 5% 3 4 5% 19%	1520
	11th to 20th	Day	18% 17% 6% 11% 5% 4 4 3 5% 5% 21%	1951
	21st to end	Day	25% 24% 5% 10% 5% 5% 4 2 4 4 13%	3124
January	1st to 10th	Night	17% 21% 8% 11% 5% 5% 4 3 4 4 19%	4109
	11th to 20th	Night	16% 20% 6% 15% 5% 5% 6% 3 4 4 15%	4120
	21st to end	Night	29% 18% 8% 12% 4 3 3 3 3 3 16%	4532
February	1st to 10th	Night	20% 16% 4 10% 6% 5% 4 2 4 4 26%	2470
	11th to 20th	Night	18% 14% 4 10% 6% 5% 4 4 5% 4 25%	2305
	21st to end	Night	20% 15% 5% 11% 5% 5% 4 2 3 5% 24%	1884
March	1st to 10th	Night	23% 12% 4 7% 4 4 3 3 4 5% 32%	3509
	11th to 20th	Night	14% 11% 4 7% 4 4 4 4 5% 5% 38%	3480
	21st to end	Night	19% 9% 3 7% 5% 4 3 3 4 5% 39%	3817
April	1st to 10th	Night	18% 11% 2 7% 5% 4 4 3 4 6% 35%	2080
	11th to 20th	Night	16% 7% 3 6% 5% 4 4 4 7% 7% 36%	1731
	21st to end	Night	15% 9% 3 6% 5% 4 5% 3 6% 6% 38%	1710
May	1st to 10th	Night	28% 10% 3 7% 5% 3 4 4 5% 5% 26%	2813
	11th to 20th	Night	18% 9% 3 7% 4 4 4 3 4 7% 39%	2812
	21st to end	Night	10% 6% 3 6% 4 4 5% 4 7% 9% 42%	3079
June	1st to 10th	Night	9% 5% 2 7% 5% 4 4 4 6% 8% 45%	1710
	11th to 20th	Night	10% 5% 2 6% 4 4 4 4 8% 11% 43%	1710
	21st to end	Night	10% 5% 2 5% 5% 4 4 5% 6% 9% 43%	1710
July	1st to 10th	Night	10% 6% 3 7% 5% 4 4 4 6% 9% 43%	2840
	11th to 20th	Night	10% 4 1 6% 5% 5% 5% 4 6% 8% 46%	2840
	21st to end	Night	7% 6% 3 7% 5% 5% 6% 5% 6% 9% 40%	3087
August	1st to 10th	Night	9% 7% 2 9% 5% 5% 6% 5% 8% 8% 36%	2825
	11th to 20th	Night	11% 7% 3 8% 4 4 4 3 4 7% 43%	2785
	21st to end	Night	6% 4 2 5% 5% 5% 5% 6% 8% 9% 46%	3171
September	1st to 10th	Night	13% 5% 2 4 3 3 3 2 5% 7% 52%	2038
	11th to 20th	Night	10% 3 1 3 3 3 4 3 5% 8% 55%	2090
	21st to end	Night	16% 7% 2 6% 4 3 3 3 4 6% 45%	2090
October	1st to 10th	Night	13% 6% 2 6% 4 4 4 3 5% 7% 47%	2194
	11th to 20th	Night	15% 9% 2 7% 5% 4 4 4 5% 6% 40%	2280
	21st to end	Night	22% 8% 2 6% 3 4 3 3 5% 6% 36%	2508
November	1st to 10th	Night	14% 8% 2 6% 5% 4 3 3 4 6% 46%	2528
	11th to 20th	Night	18% 12% 3 7% 5% 4 4 3 5% 6% 34%	2600
	21st to end	Night	20% 13% 4 8% 5% 4 4 3 5% 6% 28%	2607
December	1st to 10th	Night	23% 17% 5% 8% 5% 4 3 3 4 5% 22%	2660
	11th to 20th	Night	18% 17% 6% 9% 5% 4 4 3 5% 5% 25%	3222
	21st to end	Night	25% 21% 6% 9% 5% 4 4 3 4 4 16%	4532

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	67% 6% 9% 13% 5%	2837
	11th to 20th	Day	72% 3 10% 11% 4	2840
	21st to end	Day	77% 4 7% 8% 3 1	3124
February	1st to 10th	Day	64% 3 10% 14% 8% 1	1710
	11th to 20th	Day	61% 4 8% 16% 9% 1	1766
	21st to end	Day	59% 3 9% 18% 8% 2	1570
March	1st to 10th	Day	62% 4 8% 20% 5%	3344
	11th to 20th	Day	47% 7% 9% 26% 10% 1	3480
	21st to end	Day	52% 5% 10% 20% 12% 1	3815
April	1st to 10th	Day	53% 4 12% 18% 11% 2	2099
	11th to 20th	Day	49% 5% 12% 17% 15% 2	2413
	21st to end	Day	51% 6% 9% 20% 12% 2	2470
May	1st to 10th	Day	56% 6% 9% 20% 8% 1	4120
	11th to 20th	Day	50% 6% 11% 21% 12% 1	4085
	21st to end	Day	41% 8% 14% 21% 13% 4	4489
June	1st to 10th	Day	43% 8% 12% 23% 14% 1	2470
	11th to 20th	Day	44% 8% 13% 21% 13% 1	2470
	21st to end	Day	39% 8% 15% 21% 14% 2	2470
July	1st to 10th	Day	42% 5% 12% 23% 15% 2	4055
	11th to 20th	Day	35% 6% 12% 29% 17% 1	4051
	21st to end	Day	42% 5% 14% 18% 17% 3	4324
August	1st to 10th	Day	44% 7% 15% 24% 11%	4091
	11th to 20th	Day	40% 7% 11% 29% 13%	4083
	21st to end	Day	33% 6% 14% 32% 12% 3	4452
September	1st to 10th	Day	37% 5% 12% 22% 20% 4	2138
	11th to 20th	Day	34% 6% 13% 25% 18% 3	2090
	21st to end	Day	48% 4 10% 22% 16% 1	2090
October	1st to 10th	Day	29% 4 11% 33% 22% 1	3297
	11th to 20th	Day	41% 5% 10% 24% 16% 4	3140
	21st to end	Day	39% 3 14% 26% 18% 1	3428
November	1st to 10th	Day	40% 5% 10% 28% 16% 2	1767
	11th to 20th	Day	54% 4 8% 21% 10% 3	1800
	21st to end	Day	58% 4 10% 19% 8% 1	1662
December	1st to 10th	Day	68% 5% 9% 15% 3	1520
	11th to 20th	Day	65% 4 9% 17% 5%	1947
	21st to end	Day	75% 5% 9% 7% 3	3124
January	1st to 10th	Night	69% 4 8% 14% 4	4109
	11th to 20th	Night	72% 4 10% 11% 3	4120
	21st to end	Night	75% 3 6% 12% 3	4532
February	1st to 10th	Night	63% 4 10% 16% 7%	2470
	11th to 20th	Night	61% 5% 8% 17% 8% 1	2307
	21st to end	Night	64% 3 8% 14% 9% 2	1884
March	1st to 10th	Night	55% 4 9% 23% 9%	3509
	11th to 20th	Night	47% 5% 11% 28% 7% 1	3480
	21st to end	Night	46% 5% 9% 26% 12% 1	3817
April	1st to 10th	Night	50% 4 10% 20% 14% 2	2080
	11th to 20th	Night	44% 6% 12% 17% 17% 3	1731
	21st to end	Night	45% 5% 12% 21% 15% 2	1710
May	1st to 10th	Night	58% 5% 8% 19% 8% 2	2840
	11th to 20th	Night	46% 6% 9% 25% 12% 2	2813
	21st to end	Night	34% 8% 15% 26% 14% 4	3087
June	1st to 10th	Night	36% 6% 13% 26% 17% 3	1710
	11th to 20th	Night	34% 6% 17% 24% 17% 3	1710
	21st to end	Night	36% 8% 13% 24% 18% 2	1710
July	1st to 10th	Night	38% 6% 11% 22% 18% 5%	2795
	11th to 20th	Night	34% 5% 13% 29% 17% 1	2786
	21st to end	Night	38% 7% 13% 20% 19% 3	2988
August	1st to 10th	Night	43% 6% 15% 22% 13% 1	2814
	11th to 20th	Night	40% 5% 9% 24% 20% 1	2812
	21st to end	Night	32% 6% 15% 31% 14% 3	3171
September	1st to 10th	Night	33% 5% 11% 24% 21% 6%	2038
	11th to 20th	Night	27% 6% 12% 27% 25% 2	2090
	21st to end	Night	41% 5% 10% 21% 22% 1	2090
October	1st to 10th	Night	30% 3 7% 29% 29% 1	3662
	11th to 20th	Night	35% 4 12% 25% 18% 6%	3779
	21st to end	Night	35% 3 9% 28% 23% 2	4120
November	1st to 10th	Night	40% 4 11% 25% 17% 3	2528
	11th to 20th	Night	52% 4 9% 20% 13% 3	2600
	21st to end	Night	57% 4 11% 21% 6% 1	2607
December	1st to 10th	Night	65% 4 9% 17% 5%	2660
	11th to 20th	Night	60% 5% 13% 18% 4	3225
	21st to end	Night	71% 5% 10% 11% 3	4532

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	33% 20% 32% 9% 4 1	270
	11th to 20th	Day	35% 22% 35% 6% 1	270
	21st to end	Day	34% 23% 31% 9% 3	297
February	1st to 10th	Day	34% 20% 33% 10% 3	270
	11th to 20th	Day	33% 28% 30% 7% 1	270
	21st to end	Day	34% 28% 34% 4	225
March	1st to 10th	Day	29% 19% 30% 17% 5%	403
	11th to 20th	Day	31% 16% 32% 15% 5% 1	460
	21st to end	Day	32% 17% 29% 17% 4	506
April	1st to 10th	Day	28% 16% 30% 16% 7% 2	460
	11th to 20th	Day	30% 14% 27% 18% 8% 3	452
	21st to end	Day	24% 18% 33% 16% 6% 2	460
May	1st to 10th	Day	30% 14% 28% 17% 8% 3	463
	11th to 20th	Day	24% 9% 29% 22% 10% 6%	487
	21st to end	Day	14% 8% 26% 26% 18% 6%	529
June	1st to 10th	Day	15% 8% 31% 28% 13% 5%	490
	11th to 20th	Day	18% 8% 23% 30% 15% 6%	490
	21st to end	Day	14% 8% 31% 27% 15% 5%	490
July	1st to 10th	Day	14% 4 19% 26% 22% 15%	485
	11th to 20th	Day	12% 5% 25% 29% 20% 9%	484
	21st to end	Day	13% 4 23% 28% 22% 11%	532
August	1st to 10th	Day	15% 4 19% 28% 22% 12%	486
	11th to 20th	Day	14% 6% 19% 31% 21% 8%	479
	21st to end	Day	9% 4 22% 25% 27% 13%	539
September	1st to 10th	Day	15% 4 20% 28% 22% 10%	490
	11th to 20th	Day	10% 3 17% 30% 30% 11%	490
	21st to end	Day	27% 7% 22% 23% 16% 6%	490
October	1st to 10th	Day	14% 9% 26% 28% 19% 5%	490
	11th to 20th	Day	19% 15% 29% 25% 8% 3	490
	21st to end	Day	28% 13% 31% 19% 8% 1	539
November	1st to 10th	Day	20% 18% 34% 16% 10% 2	305
	11th to 20th	Day	32% 12% 32% 17% 5% 2	300
	21st to end	Day	28% 18% 39% 13% 2	242
December	1st to 10th	Day	30% 19% 34% 11% 3 2	180
	11th to 20th	Day	27% 22% 34% 13% 3	193
	21st to end	Day	35% 19% 29% 14% 3	297
January	1st to 10th	Night	30% 17% 32% 17% 4	760
	11th to 20th	Night	32% 17% 30% 18% 3	760
	21st to end	Night	30% 18% 29% 21% 3	836
February	1st to 10th	Night	31% 14% 30% 23% 2	760
	11th to 20th	Night	29% 18% 32% 19% 2	743
	21st to end	Night	29% 16% 33% 18% 3	628
March	1st to 10th	Night	26% 15% 31% 24% 4	760
	11th to 20th	Night	26% 17% 27% 23% 7%	760
	21st to end	Night	27% 13% 31% 23% 6%	836
April	1st to 10th	Night	25% 13% 32% 23% 6% 1	760
	11th to 20th	Night	21% 12% 33% 23% 11% 1	607
	21st to end	Night	20% 8% 35% 28% 7% 1	570
May	1st to 10th	Night	22% 7% 27% 31% 12% 1	570
	11th to 20th	Night	20% 6% 24% 35% 14% 1	561
	21st to end	Night	12% 3 20% 39% 24% 3	617
June	1st to 10th	Night	11% 5% 23% 40% 21% 1	570
	11th to 20th	Night	14% 3 19% 40% 22% 2	570
	21st to end	Night	12% 3 20% 39% 24% 2	570
July	1st to 10th	Night	11% 2 14% 40% 26% 7%	555
	11th to 20th	Night	9% 3 16% 36% 30% 6%	552
	21st to end	Night	11% 2 12% 40% 32% 3	624
August	1st to 10th	Night	8% 1 12% 44% 31% 4	567
	11th to 20th	Night	12% 2 13% 42% 27% 5%	564
	21st to end	Night	9% 2 17% 32% 34% 7%	648
September	1st to 10th	Night	16% 4 15% 31% 28% 6%	760
	11th to 20th	Night	11% 2 12% 37% 32% 5%	760
	21st to end	Night	19% 5% 21% 31% 20% 3	760
October	1st to 10th	Night	17% 5% 21% 33% 21% 3	760
	11th to 20th	Night	20% 9% 30% 28% 13% 1	760
	21st to end	Night	26% 10% 26% 28% 10%	836
November	1st to 10th	Night	18% 10% 27% 29% 15% 1	780
	11th to 20th	Night	27% 12% 29% 23% 9% 1	800
	21st to end	Night	28% 12% 29% 24% 6% 1	779
December	1st to 10th	Night	35% 12% 29% 19% 4	760
	11th to 20th	Night	27% 14% 30% 23% 4	760
	21st to end	Night	32% 13% 31% 22% 3	836

Page generated at 2024-11-22 08:02:29. Version ac07

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