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 2026-01-17.

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 8% 5% 5% 5% 4 5% 7% 32%	126676
	Night	16% 11% 4 9% 5% 4 4 3 5% 6% 33%	125002
Transparency	Day	50% 5% 11% 21% 12% 1	130333
	Night	51% 4 11% 20% 12% 2	129414
Seeing	Day	22% 12% 27% 21% 12% 5%	16253
	Night	22% 10% 25% 28% 14% 2	26629

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	16% 20% 6% 19% 6% 4 4 2 4 5% 15%	4146
	11th to 20th	Day	14% 22% 8% 13% 7% 5% 4 3 3 4 17%	4114
	21st to end	Day	22% 20% 6% 10% 7% 6% 5% 3 4 3 14%	4466
February	1st to 10th	Day	20% 17% 5% 9% 7% 4 3 3 4 4 24%	1800
	11th to 20th	Day	16% 15% 6% 12% 6% 4 4 2 5% 6% 24%	1852
	21st to end	Day	17% 15% 5% 10% 5% 4 3 2 3 5% 30%	1650
March	1st to 10th	Day	18% 15% 5% 9% 5% 4 5% 3 4 4 28%	4802
	11th to 20th	Day	12% 9% 3 8% 5% 5% 4 3 5% 7% 40%	4980
	21st to end	Day	21% 9% 4 8% 5% 5% 4 3 4 6% 31%	5465
April	1st to 10th	Day	17% 13% 3 9% 5% 4 4 3 5% 6% 32%	2210
	11th to 20th	Day	17% 10% 3 6% 5% 5% 5% 3 5% 7% 35%	2542
	21st to end	Day	18% 8% 3 8% 5% 5% 5% 4 5% 6% 33%	2600
May	1st to 10th	Day	21% 10% 3 7% 5% 6% 5% 4 5% 6% 27%	5862
	11th to 20th	Day	19% 8% 3 7% 5% 5% 5% 4 5% 7% 32%	5861
	21st to end	Day	18% 6% 3 6% 5% 5% 5% 4 7% 8% 33%	6433
June	1st to 10th	Day	11% 7% 2 7% 6% 5% 6% 5% 6% 8% 36%	2600
	11th to 20th	Day	12% 6% 3 7% 6% 5% 6% 4 7% 9% 34%	2600
	21st to end	Day	11% 5% 2 5% 5% 5% 5% 5% 9% 10% 36%	2600
July	1st to 10th	Day	9% 6% 3 7% 5% 5% 5% 4 6% 9% 41%	5900
	11th to 20th	Day	10% 7% 3 8% 6% 6% 5% 4 8% 10% 34%	5900
	21st to end	Day	11% 7% 3 7% 5% 5% 5% 4 7% 9% 37%	6424
August	1st to 10th	Day	11% 7% 2 7% 5% 5% 6% 5% 7% 10% 34%	4234
	11th to 20th	Day	9% 6% 2 8% 5% 5% 6% 5% 8% 10% 36%	4174
	21st to end	Day	6% 5% 2 6% 4 5% 5% 5% 7% 10% 45%	4593
September	1st to 10th	Day	14% 5% 2 6% 4 3 4 3 5% 7% 47%	2250
	11th to 20th	Day	9% 5% 2 6% 4 4 5% 3 7% 9% 46%	2200
	21st to end	Day	21% 7% 2 7% 4 4 4 3 4 6% 38%	2200
October	1st to 10th	Day	14% 7% 2 6% 4 4 4 4 6% 6% 44%	2089
	11th to 20th	Day	14% 8% 3 7% 4 4 5% 4 5% 6% 39%	2000
	21st to end	Day	21% 10% 3 6% 4 4 4 3 5% 6% 35%	2200
November	1st to 10th	Day	11% 8% 3 7% 5% 4 3 3 6% 6% 44%	1857
	11th to 20th	Day	18% 13% 4 8% 5% 3 4 3 4 5% 33%	1890
	21st to end	Day	20% 14% 6% 9% 5% 4 3 3 5% 5% 28%	1796
December	1st to 10th	Day	19% 13% 5% 14% 5% 4 4 3 4 5% 24%	2680
	11th to 20th	Day	23% 17% 6% 10% 5% 4 4 3 4 5% 22%	3141
	21st to end	Day	25% 21% 5% 11% 5% 5% 4 2 4 4 15%	4565
January	1st to 10th	Night	16% 19% 8% 19% 6% 5% 4 3 3 4 15%	6019
	11th to 20th	Night	14% 21% 7% 13% 8% 7% 5% 3 4 4 14%	5979
	21st to end	Night	22% 15% 6% 11% 6% 4 4 3 3 4 22%	6490
February	1st to 10th	Night	20% 16% 4 10% 6% 5% 4 2 4 5% 25%	2600
	11th to 20th	Night	19% 13% 4 11% 6% 5% 4 4 5% 4 24%	2429
	21st to end	Night	20% 15% 5% 11% 5% 5% 4 2 3 5% 25%	1980
March	1st to 10th	Night	21% 13% 4 8% 4 4 3 3 3 5% 32%	5051
	11th to 20th	Night	12% 10% 3 6% 4 4 4 4 6% 7% 40%	4980
	21st to end	Night	18% 10% 3 7% 5% 5% 3 3 4 5% 36%	5467
April	1st to 10th	Night	19% 11% 2 7% 5% 4 4 4 4 6% 34%	2189
	11th to 20th	Night	16% 7% 3 6% 6% 4 4 4 7% 7% 36%	1823
	21st to end	Night	15% 9% 3 6% 5% 4 5% 3 6% 6% 39%	1800
May	1st to 10th	Night	27% 10% 3 7% 5% 4 4 4 5% 5% 26%	4033
	11th to 20th	Night	17% 8% 3 7% 4 4 4 3 5% 9% 37%	4032
	21st to end	Night	15% 7% 3 6% 4 4 5% 4 6% 8% 37%	4421
June	1st to 10th	Night	9% 5% 2 7% 5% 4 4 4 6% 8% 46%	1800
	11th to 20th	Night	11% 5% 3 6% 4 4 4 4 7% 11% 42%	1800
	21st to end	Night	10% 5% 2 6% 5% 4 4 5% 6% 10% 44%	1800
July	1st to 10th	Night	10% 7% 3 7% 5% 5% 4 3 6% 8% 42%	4058
	11th to 20th	Night	10% 6% 2 7% 5% 6% 5% 5% 7% 8% 38%	4057
	21st to end	Night	7% 6% 3 8% 5% 5% 5% 4 6% 9% 41%	4427
August	1st to 10th	Night	9% 7% 2 9% 5% 5% 6% 5% 8% 8% 37%	2915
	11th to 20th	Night	11% 7% 3 8% 4 3 4 3 4 7% 44%	2875
	21st to end	Night	6% 4 2 5% 5% 5% 5% 6% 8% 9% 46%	3271
September	1st to 10th	Night	13% 5% 2 4 3 3 3 2 5% 7% 52%	2146
	11th to 20th	Night	9% 3 1 4 3 3 4 3 5% 8% 56%	2200
	21st to end	Night	16% 7% 2 6% 4 3 3 3 4 6% 44%	2200
October	1st to 10th	Night	13% 6% 1 5% 4 4 4 3 5% 7% 48%	2310
	11th to 20th	Night	14% 8% 2 7% 4 4 4 4 5% 6% 41%	2400
	21st to end	Night	21% 8% 2 6% 3 4 3 3 5% 6% 37%	2640
November	1st to 10th	Night	14% 7% 2 6% 5% 4 3 3 4 6% 46%	2658
	11th to 20th	Night	18% 12% 3 7% 5% 4 4 3 5% 6% 34%	2730
	21st to end	Night	20% 14% 4 8% 6% 4 4 3 5% 5% 28%	2817
December	1st to 10th	Night	18% 14% 7% 11% 5% 5% 4 4 4 6% 22%	4720
	11th to 20th	Night	19% 18% 7% 11% 4 3 3 3 4 5% 21%	5252
	21st to end	Night	24% 19% 5% 9% 5% 4 4 3 4 5% 18%	6633

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	72% 5% 9% 10% 4	4147
	11th to 20th	Day	73% 2 8% 9% 7% 1	4114
	21st to end	Day	74% 4 7% 9% 5%	4466
February	1st to 10th	Day	65% 3 10% 15% 7% 1	1800
	11th to 20th	Day	62% 4 8% 16% 9% 1	1861
	21st to end	Day	58% 3 10% 18% 8% 2	1650
March	1st to 10th	Day	59% 4 7% 22% 7% 1	4802
	11th to 20th	Day	44% 5% 10% 29% 11% 2	4980
	21st to end	Day	54% 4 8% 20% 12% 1	5465
April	1st to 10th	Day	53% 4 11% 18% 11% 2	2210
	11th to 20th	Day	49% 5% 12% 17% 14% 2	2542
	21st to end	Day	50% 6% 9% 21% 13% 2	2600
May	1st to 10th	Day	57% 5% 9% 17% 9% 3	5897
	11th to 20th	Day	51% 5% 10% 21% 12% 1	5865
	21st to end	Day	46% 6% 12% 22% 11% 3	6447
June	1st to 10th	Day	43% 7% 12% 23% 14% 1	2600
	11th to 20th	Day	45% 8% 13% 21% 13% 1	2600
	21st to end	Day	39% 8% 15% 21% 14% 2	2600
July	1st to 10th	Day	40% 4 11% 28% 15% 1	5835
	11th to 20th	Day	44% 5% 14% 24% 13% 1	5831
	21st to end	Day	42% 4 13% 20% 18% 3	6240
August	1st to 10th	Day	43% 7% 15% 24% 11%	4221
	11th to 20th	Day	39% 7% 11% 30% 13%	4213
	21st to end	Day	33% 6% 14% 33% 12% 2	4593
September	1st to 10th	Day	36% 4 12% 23% 20% 4	2250
	11th to 20th	Day	33% 6% 13% 26% 18% 3	2200
	21st to end	Day	48% 4 10% 21% 17% 1	2200
October	1st to 10th	Day	28% 4 11% 34% 22% 1	3401
	11th to 20th	Day	40% 5% 10% 24% 17% 4	3240
	21st to end	Day	39% 3 13% 26% 18% 1	3538
November	1st to 10th	Day	40% 4 10% 27% 16% 2	1857
	11th to 20th	Day	53% 4 8% 22% 10% 3	1890
	21st to end	Day	59% 4 10% 18% 8% 1	1796
December	1st to 10th	Day	64% 3 13% 15% 4	2680
	11th to 20th	Day	67% 3 11% 14% 5%	3137
	21st to end	Day	75% 4 8% 9% 4	4565
January	1st to 10th	Night	75% 3 7% 12% 3	6019
	11th to 20th	Night	74% 3 9% 9% 4	5979
	21st to end	Night	68% 3 9% 13% 5% 2	6490
February	1st to 10th	Night	63% 4 10% 16% 7%	2600
	11th to 20th	Night	63% 5% 8% 16% 8% 1	2431
	21st to end	Night	64% 3 8% 14% 9% 2	1980
March	1st to 10th	Night	55% 4 8% 24% 10% 1	5051
	11th to 20th	Night	43% 4 12% 30% 9% 2	4980
	21st to end	Night	50% 4 8% 21% 14% 2	5467
April	1st to 10th	Night	51% 4 10% 19% 14% 2	2189
	11th to 20th	Night	45% 6% 12% 18% 17% 3	1823
	21st to end	Night	45% 5% 11% 22% 15% 2	1800
May	1st to 10th	Night	59% 5% 9% 15% 8% 4	4060
	11th to 20th	Night	46% 6% 9% 24% 14% 1	4033
	21st to end	Night	43% 6% 13% 25% 10% 3	4429
June	1st to 10th	Night	36% 6% 12% 25% 18% 3	1800
	11th to 20th	Night	35% 6% 16% 23% 17% 2	1800
	21st to end	Night	35% 8% 13% 24% 18% 2	1800
July	1st to 10th	Night	39% 5% 11% 23% 18% 4	4015
	11th to 20th	Night	42% 5% 16% 24% 12% 1	4006
	21st to end	Night	38% 6% 13% 20% 20% 3	4297
August	1st to 10th	Night	42% 6% 15% 23% 13% 1	2904
	11th to 20th	Night	40% 5% 9% 25% 19% 1	2902
	21st to end	Night	32% 6% 15% 31% 14% 3	3271
September	1st to 10th	Night	32% 5% 11% 25% 21% 5%	2146
	11th to 20th	Night	26% 5% 12% 28% 25% 2	2200
	21st to end	Night	41% 5% 10% 20% 22% 1	2200
October	1st to 10th	Night	30% 3 7% 29% 29% 1	3778
	11th to 20th	Night	35% 4 12% 25% 19% 5%	3899
	21st to end	Night	35% 3 9% 29% 23% 2	4252
November	1st to 10th	Night	40% 3 11% 25% 17% 3	2658
	11th to 20th	Night	52% 4 9% 21% 13% 2	2730
	21st to end	Night	59% 4 11% 20% 6% 1	2817
December	1st to 10th	Night	64% 3 11% 17% 5%	4720
	11th to 20th	Night	66% 3 14% 13% 3	5255
	21st to end	Night	70% 4 9% 13% 4	6633

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	35% 19% 33% 8% 4 1	330
	11th to 20th	Day	36% 25% 32% 5% 1	318
	21st to end	Day	33% 24% 31% 9% 2	330
February	1st to 10th	Day	32% 22% 33% 9% 2	300
	11th to 20th	Day	36% 26% 30% 6% 1	300
	21st to end	Day	32% 29% 35% 4	249
March	1st to 10th	Day	28% 21% 30% 16% 5%	440
	11th to 20th	Day	30% 17% 31% 15% 6% 1	500
	21st to end	Day	33% 17% 29% 17% 3	550
April	1st to 10th	Day	29% 17% 30% 15% 7% 2	500
	11th to 20th	Day	30% 15% 28% 17% 7% 3	492
	21st to end	Day	24% 17% 32% 18% 6% 2	500
May	1st to 10th	Day	30% 14% 28% 17% 8% 3	503
	11th to 20th	Day	24% 9% 31% 21% 10% 5%	527
	21st to end	Day	17% 9% 27% 25% 17% 6%	573
June	1st to 10th	Day	15% 8% 32% 28% 12% 5%	530
	11th to 20th	Day	17% 8% 24% 31% 15% 5%	530
	21st to end	Day	13% 8% 30% 28% 15% 6%	530
July	1st to 10th	Day	14% 4 18% 26% 23% 14%	525
	11th to 20th	Day	12% 4 25% 29% 20% 9%	524
	21st to end	Day	12% 4 22% 28% 23% 11%	576
August	1st to 10th	Day	14% 4 20% 28% 23% 11%	526
	11th to 20th	Day	13% 6% 19% 32% 22% 9%	519
	21st to end	Day	9% 4 21% 26% 27% 13%	583
September	1st to 10th	Day	15% 4 20% 26% 23% 11%	530
	11th to 20th	Day	9% 3 16% 29% 30% 13%	530
	21st to end	Day	27% 7% 22% 23% 16% 6%	530
October	1st to 10th	Day	14% 8% 25% 27% 21% 5%	530
	11th to 20th	Day	18% 15% 30% 25% 8% 3	530
	21st to end	Day	28% 13% 31% 19% 8% 1	583
November	1st to 10th	Day	20% 18% 36% 15% 9% 2	335
	11th to 20th	Day	32% 13% 32% 16% 5% 2	330
	21st to end	Day	31% 17% 37% 13% 2	280
December	1st to 10th	Day	30% 20% 35% 11% 2 2	220
	11th to 20th	Day	30% 23% 31% 13% 3	237
	21st to end	Day	37% 18% 29% 13% 3	363
January	1st to 10th	Night	30% 17% 31% 18% 4	840
	11th to 20th	Night	31% 18% 30% 17% 3	825
	21st to end	Night	30% 18% 29% 20% 3	880
February	1st to 10th	Night	31% 15% 30% 22% 2	800
	11th to 20th	Night	30% 18% 31% 19% 2	783
	21st to end	Night	28% 16% 34% 18% 3	660
March	1st to 10th	Night	26% 15% 31% 24% 4	800
	11th to 20th	Night	26% 17% 27% 23% 7%	800
	21st to end	Night	27% 13% 32% 22% 6%	880
April	1st to 10th	Night	26% 13% 32% 23% 6% 1	800
	11th to 20th	Night	21% 12% 32% 23% 10% 1	639
	21st to end	Night	20% 8% 35% 29% 8% 1	600
May	1st to 10th	Night	23% 7% 27% 32% 11% 1	600
	11th to 20th	Night	20% 6% 24% 34% 14% 1	591
	21st to end	Night	13% 3 20% 38% 22% 3	650
June	1st to 10th	Night	11% 5% 23% 41% 20% 1	600
	11th to 20th	Night	15% 3 18% 40% 22% 2	600
	21st to end	Night	12% 3 20% 39% 25% 2	600
July	1st to 10th	Night	11% 2 14% 41% 27% 6%	585
	11th to 20th	Night	9% 3 16% 35% 31% 6%	582
	21st to end	Night	11% 2 12% 40% 32% 3	657
August	1st to 10th	Night	8% 1 12% 44% 30% 4	597
	11th to 20th	Night	11% 2 12% 41% 28% 5%	594
	21st to end	Night	9% 1 17% 32% 34% 7%	682
September	1st to 10th	Night	15% 4 15% 31% 29% 6%	800
	11th to 20th	Night	11% 2 12% 37% 33% 5%	800
	21st to end	Night	19% 5% 21% 32% 20% 3	800
October	1st to 10th	Night	17% 5% 21% 33% 23% 3	800
	11th to 20th	Night	19% 9% 30% 29% 13% 1	800
	21st to end	Night	25% 10% 27% 28% 9%	880
November	1st to 10th	Night	18% 10% 28% 29% 14% 1	820
	11th to 20th	Night	27% 12% 28% 23% 9% 1	840
	21st to end	Night	29% 12% 29% 23% 6%	840
December	1st to 10th	Night	33% 13% 30% 19% 4	840
	11th to 20th	Night	28% 14% 30% 23% 4	840
	21st to end	Night	32% 13% 30% 23% 3	924

Page generated at 2026-01-14 01:14:29. Version ac07

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