Enid
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Enid clear sky chart from 2005-11-06 to 2025-04-11.

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	9% 5% 2 5% 4 3 4 3 5% 7% 54%	114018
	Night	8% 5% 2 4 3 3 3 3 5% 7% 57%	114488
Transparency	Day	30% 4 10% 25% 23% 8%	117776
	Night	27% 4 10% 26% 26% 9%	118859
Seeing	Day	12% 9% 29% 30% 16% 3	15925
	Night	11% 10% 34% 34% 11% 1	25997

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	11% 6% 2 7% 4 4 4 3 5% 7% 46%	4077
	11th to 20th	Day	5% 6% 3 6% 3 4 3 3 4 5% 59%	4080
	21st to end	Day	12% 7% 3 6% 3 3 2 2 3 4 53%	4488
February	1st to 10th	Day	10% 11% 3 6% 4 3 3 2 4 6% 47%	1885
	11th to 20th	Day	8% 6% 3 6% 4 3 3 3 4 6% 54%	1949
	21st to end	Day	9% 8% 2 5% 3 3 3 3 4 6% 55%	1650
March	1st to 10th	Day	8% 6% 2 5% 3 3 3 2 3 5% 60%	4777
	11th to 20th	Day	6% 6% 2 6% 3 3 4 3 5% 7% 56%	4980
	21st to end	Day	8% 7% 3 7% 4 5% 4 4 5% 7% 46%	5462
April	1st to 10th	Day	9% 5% 2 5% 4 3 4 4 5% 7% 52%	2200
	11th to 20th	Day	13% 6% 2 6% 4 4 4 3 4 6% 48%	2297
	21st to end	Day	14% 6% 2 5% 5% 3 3 4 5% 6% 48%	2470
May	1st to 10th	Day	20% 8% 2 5% 4 4 3 2 5% 4 43%	4082
	11th to 20th	Day	10% 4 2 5% 4 4 4 3 6% 7% 50%	4082
	21st to end	Day	12% 6% 2 6% 4 4 4 4 5% 6% 47%	4477
June	1st to 10th	Day	5% 4 2 6% 3 4 5% 4 7% 10% 51%	2470
	11th to 20th	Day	5% 4 1 5% 4 4 4 3 6% 9% 55%	2470
	21st to end	Day	5% 3 2 3 3 3 4 3 6% 7% 59%	2470
July	1st to 10th	Day	9% 5% 2 5% 4 4 5% 4 6% 8% 49%	4120
	11th to 20th	Day	5% 4 1 4 3 3 4 4 6% 9% 56%	4120
	21st to end	Day	5% 2 1 4 3 4 4 5% 6% 11% 55%	4465
August	1st to 10th	Day	7% 3 2 4 3 4 4 4 6% 9% 54%	4104
	11th to 20th	Day	6% 3 2 5% 4 4 4 4 6% 9% 53%	4041
	21st to end	Day	4 3 1 4 3 3 4 3 5% 8% 62%	4244
September	1st to 10th	Day	9% 4 1 4 3 3 4 3 5% 6% 57%	2090
	11th to 20th	Day	10% 5% 1 5% 4 4 4 3 5% 6% 52%	2090
	21st to end	Day	9% 4 1 4 3 3 4 3 4 6% 60%	2090
October	1st to 10th	Day	9% 4 1 4 3 3 3 2 4 5% 61%	2066
	11th to 20th	Day	8% 4 1 3 2 2 2 2 3 4 68%	1900
	21st to end	Day	11% 5% 2 5% 3 2 2 2 4 5% 60%	2090
November	1st to 10th	Day	7% 4 1 4 2 3 3 3 5% 6% 64%	1813
	11th to 20th	Day	7% 5% 1 3 3 3 3 3 3 6% 64%	1800
	21st to end	Day	10% 5% 2 3 3 2 2 3 4 6% 61%	1800
December	1st to 10th	Day	5% 5% 1 5% 3 3 3 2 4 6% 63%	2940
	11th to 20th	Day	7% 5% 2 5% 3 3 3 2 4 6% 61%	3391
	21st to end	Day	13% 10% 4 8% 4 4 4 3 4 5% 42%	4488
January	1st to 10th	Night	12% 7% 2 5% 4 3 4 3 5% 6% 51%	5888
	11th to 20th	Night	3 3 1 4 4 3 5% 4 5% 6% 62%	5900
	21st to end	Night	13% 7% 2 5% 3 3 3 2 4 5% 53%	6490
February	1st to 10th	Night	12% 10% 2 5% 4 3 3 3 4 5% 49%	2530
	11th to 20th	Night	11% 7% 2 5% 4 3 3 3 5% 5% 53%	2338
	21st to end	Night	8% 6% 2 4 4 3 3 3 5% 6% 56%	1980
March	1st to 10th	Night	7% 5% 2 5% 4 3 3 3 4 5% 59%	5082
	11th to 20th	Night	6% 4 1 4 2 2 3 3 5% 6% 64%	4980
	21st to end	Night	7% 6% 2 6% 4 4 4 3 5% 7% 51%	5467
April	1st to 10th	Night	9% 4 1 4 3 3 3 3 5% 7% 57%	2200
	11th to 20th	Night	12% 6% 2 5% 3 4 3 3 4 7% 52%	1832
	21st to end	Night	14% 4 2 5% 3 3 3 3 4 7% 52%	1710
May	1st to 10th	Night	18% 7% 2 4 3 3 3 3 4 6% 47%	2823
	11th to 20th	Night	11% 5% 2 5% 3 4 4 4 6% 8% 47%	2823
	21st to end	Night	7% 5% 1 4 3 3 3 3 5% 8% 57%	3090
June	1st to 10th	Night	6% 4 1 4 3 4 3 4 6% 10% 56%	1710
	11th to 20th	Night	5% 3 1 4 4 3 3 3 8% 10% 56%	1710
	21st to end	Night	4 2 1 3 3 3 4 3 6% 9% 62%	1710
July	1st to 10th	Night	5% 5% 1 4 3 3 4 3 7% 9% 55%	2850
	11th to 20th	Night	3 2 2 4 3 3 4 3 6% 11% 59%	2850
	21st to end	Night	4 3 1 3 3 3 3 3 6% 10% 62%	3098
August	1st to 10th	Night	3 2 1 4 4 4 5% 5% 7% 9% 57%	2836
	11th to 20th	Night	5% 3 2 4 5% 4 5% 5% 7% 9% 51%	2798
	21st to end	Night	2 2 1 3 3 3 4 3 5% 8% 64%	3401
September	1st to 10th	Night	8% 3 1 4 2 3 3 3 4 6% 62%	2090
	11th to 20th	Night	9% 5% 2 5% 3 3 4 2 5% 6% 55%	2090
	21st to end	Night	6% 4 1 4 3 2 3 4 6% 7% 61%	2090
October	1st to 10th	Night	8% 4 1 5% 3 3 3 3 5% 5% 62%	2095
	11th to 20th	Night	9% 3 1 3 2 2 2 2 4 5% 67%	2280
	21st to end	Night	10% 4 1 3 3 3 2 2 3 5% 64%	2508
November	1st to 10th	Night	8% 4 1 4 2 2 3 2 4 5% 65%	2483
	11th to 20th	Night	7% 4 1 4 3 3 3 3 4 5% 63%	2600
	21st to end	Night	10% 5% 1 3 3 2 3 2 3 7% 61%	2600
December	1st to 10th	Night	5% 4 1 3 2 2 2 2 4 6% 69%	4250
	11th to 20th	Night	7% 4 2 5% 3 3 3 2 3 5% 63%	4816
	21st to end	Night	14% 7% 2 5% 3 3 3 2 4 6% 51%	6490

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	38% 3 11% 25% 20% 2	4078
	11th to 20th	Day	28% 3 11% 21% 30% 8%	4080
	21st to end	Day	36% 2 7% 20% 30% 5%	4488
February	1st to 10th	Day	39% 2 11% 23% 19% 5%	1885
	11th to 20th	Day	34% 2 9% 29% 20% 6%	1959
	21st to end	Day	33% 2 7% 23% 25% 11%	1650
March	1st to 10th	Day	29% 2 5% 16% 22% 25%	4777
	11th to 20th	Day	28% 3 7% 18% 25% 18%	4980
	21st to end	Day	37% 4 11% 30% 16% 2	5464
April	1st to 10th	Day	30% 5% 11% 25% 21% 8%	2200
	11th to 20th	Day	37% 4 10% 23% 17% 8%	2297
	21st to end	Day	36% 5% 12% 27% 18% 3	2470
May	1st to 10th	Day	44% 5% 8% 18% 19% 6%	4120
	11th to 20th	Day	32% 6% 13% 27% 18% 3	4086
	21st to end	Day	38% 5% 10% 19% 18% 10%	4489
June	1st to 10th	Day	27% 6% 19% 28% 16% 4	2470
	11th to 20th	Day	26% 4 15% 26% 22% 7%	2470
	21st to end	Day	22% 5% 13% 27% 25% 7%	2470
July	1st to 10th	Day	32% 6% 11% 26% 20% 6%	4056
	11th to 20th	Day	24% 4 10% 32% 25% 5%	4051
	21st to end	Day	21% 6% 15% 32% 23% 2	4325
August	1st to 10th	Day	26% 5% 12% 28% 23% 6%	4090
	11th to 20th	Day	27% 6% 15% 29% 20% 3	4080
	21st to end	Day	21% 5% 13% 37% 20% 5%	4243
September	1st to 10th	Day	28% 4 9% 24% 24% 11%	2090
	11th to 20th	Day	32% 6% 9% 23% 24% 6%	2090
	21st to end	Day	26% 4 8% 24% 29% 8%	2090
October	1st to 10th	Day	17% 2 5% 16% 43% 16%	3430
	11th to 20th	Day	15% 2 7% 23% 38% 15%	3140
	21st to end	Day	22% 3 7% 28% 30% 10%	3428
November	1st to 10th	Day	22% 3 9% 25% 29% 11%	1813
	11th to 20th	Day	24% 3 8% 27% 28% 11%	1800
	21st to end	Day	26% 3 8% 30% 25% 8%	1800
December	1st to 10th	Day	24% 3 6% 40% 25% 2	2940
	11th to 20th	Day	27% 2 6% 27% 31% 7%	3389
	21st to end	Day	44% 4 8% 25% 15% 4	4488
January	1st to 10th	Night	35% 3 10% 30% 18% 3	5888
	11th to 20th	Night	22% 4 11% 21% 34% 8%	5900
	21st to end	Night	36% 3 6% 19% 31% 6%	6490
February	1st to 10th	Night	38% 3 9% 23% 20% 7%	2530
	11th to 20th	Night	33% 3 11% 25% 21% 6%	2338
	21st to end	Night	29% 4 7% 21% 26% 13%	1980
March	1st to 10th	Night	28% 3 5% 18% 26% 20%	5082
	11th to 20th	Night	21% 3 7% 21% 25% 24%	4980
	21st to end	Night	32% 5% 10% 32% 18% 3	5467
April	1st to 10th	Night	27% 4 11% 22% 26% 11%	2200
	11th to 20th	Night	32% 4 10% 25% 18% 10%	1832
	21st to end	Night	32% 4 11% 27% 23% 4	1710
May	1st to 10th	Night	40% 5% 9% 16% 23% 6%	2850
	11th to 20th	Night	34% 7% 14% 26% 17% 2	2824
	21st to end	Night	25% 5% 13% 25% 23% 9%	3099
June	1st to 10th	Night	24% 5% 19% 31% 17% 4	1710
	11th to 20th	Night	22% 5% 15% 31% 22% 5%	1710
	21st to end	Night	19% 4 14% 31% 22% 11%	1710
July	1st to 10th	Night	26% 4 14% 29% 22% 4	2805
	11th to 20th	Night	19% 4 10% 33% 29% 5%	2796
	21st to end	Night	18% 4 16% 33% 26% 3	2999
August	1st to 10th	Night	21% 6% 13% 27% 24% 8%	2826
	11th to 20th	Night	27% 5% 14% 27% 23% 4	2825
	21st to end	Night	18% 6% 13% 37% 20% 5%	3401
September	1st to 10th	Night	24% 4 9% 27% 26% 11%	2090
	11th to 20th	Night	29% 5% 10% 22% 26% 8%	2090
	21st to end	Night	22% 5% 8% 25% 31% 10%	2090
October	1st to 10th	Night	16% 2 7% 14% 41% 20%	3498
	11th to 20th	Night	15% 2 6% 22% 38% 18%	3779
	21st to end	Night	20% 2 6% 25% 36% 11%	4120
November	1st to 10th	Night	23% 3 8% 24% 30% 12%	2483
	11th to 20th	Night	24% 3 8% 25% 29% 11%	2600
	21st to end	Night	26% 2 8% 25% 29% 10%	2600
December	1st to 10th	Night	19% 3 8% 41% 26% 3	4250
	11th to 20th	Night	26% 2 6% 28% 29% 9%	4817
	21st to end	Night	36% 3 8% 29% 19% 5%	6490

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	16% 12% 37% 25% 9% 1	300
	11th to 20th	Day	17% 17% 39% 23% 4	300
	21st to end	Day	13% 15% 45% 23% 4 1	330
February	1st to 10th	Day	18% 16% 41% 21% 4	300
	11th to 20th	Day	17% 17% 43% 18% 5%	300
	21st to end	Day	18% 23% 39% 15% 5% 1	249
March	1st to 10th	Day	17% 19% 40% 20% 3 1	300
	11th to 20th	Day	17% 19% 42% 18% 4	300
	21st to end	Day	21% 18% 42% 15% 4	330
April	1st to 10th	Day	19% 23% 34% 20% 5%	300
	11th to 20th	Day	18% 21% 41% 19% 2	495
	21st to end	Day	19% 18% 36% 17% 9% 2	650
May	1st to 10th	Day	15% 11% 45% 20% 8% 2	653
	11th to 20th	Day	17% 9% 30% 30% 12% 2	675
	21st to end	Day	14% 8% 34% 27% 15% 2	734
June	1st to 10th	Day	7% 6% 22% 39% 23% 4	680
	11th to 20th	Day	6% 4 32% 41% 15% 3	680
	21st to end	Day	5% 2 27% 43% 20% 3	680
July	1st to 10th	Day	8% 3 14% 36% 32% 8%	671
	11th to 20th	Day	4 3 15% 39% 32% 7%	668
	21st to end	Day	6% 1 9% 40% 36% 8%	739
August	1st to 10th	Day	8% 2 14% 43% 27% 5%	676
	11th to 20th	Day	6% 2 14% 40% 31% 7%	665
	21st to end	Day	5% 2 15% 38% 32% 9%	590
September	1st to 10th	Day	7% 1 12% 38% 33% 9%	300
	11th to 20th	Day	6% 3 18% 45% 24% 3	300
	21st to end	Day	11% 5% 26% 34% 17% 7%	300
October	1st to 10th	Day	11% 5% 28% 30% 18% 7%	300
	11th to 20th	Day	8% 12% 37% 31% 11% 2	300
	21st to end	Day	20% 12% 31% 24% 12% 2	330
November	1st to 10th	Day	12% 9% 39% 31% 7% 3	300
	11th to 20th	Day	15% 12% 37% 23% 11% 2	300
	21st to end	Day	17% 14% 36% 22% 10% 1	300
December	1st to 10th	Day	10% 13% 44% 26% 6% 1	300
	11th to 20th	Day	16% 12% 41% 22% 9% 1	300
	21st to end	Day	16% 20% 39% 21% 5%	330
January	1st to 10th	Night	9% 11% 41% 31% 7%	1000
	11th to 20th	Night	11% 13% 39% 30% 6%	1000
	21st to end	Night	12% 13% 38% 32% 5%	1100
February	1st to 10th	Night	16% 13% 38% 28% 4	930
	11th to 20th	Night	15% 15% 41% 25% 4	784
	21st to end	Night	12% 15% 40% 29% 4	660
March	1st to 10th	Night	13% 13% 41% 30% 3	677
	11th to 20th	Night	18% 11% 38% 27% 5%	600
	21st to end	Night	15% 16% 42% 22% 5%	660
April	1st to 10th	Night	14% 15% 42% 24% 5%	600
	11th to 20th	Night	16% 15% 44% 22% 4	565
	21st to end	Night	17% 15% 38% 23% 6% 1	570
May	1st to 10th	Night	13% 12% 45% 24% 6%	570
	11th to 20th	Night	13% 8% 32% 33% 13% 1	561
	21st to end	Night	8% 8% 35% 35% 12% 2	617
June	1st to 10th	Night	7% 4 29% 40% 18% 1	570
	11th to 20th	Night	6% 4 39% 41% 11%	570
	21st to end	Night	3 4 33% 47% 13% 1	570
July	1st to 10th	Night	6% 2 19% 44% 29% 1	555
	11th to 20th	Night	4 1 18% 47% 27% 1	552
	21st to end	Night	4 2 13% 53% 27% 2	624
August	1st to 10th	Night	4 2 19% 46% 28% 1	567
	11th to 20th	Night	8% 2 18% 46% 24% 1	564
	21st to end	Night	3 1 16% 45% 33% 2	627
September	1st to 10th	Night	10% 2 18% 41% 27% 2	570
	11th to 20th	Night	11% 3 23% 39% 23% 1	570
	21st to end	Night	7% 6% 27% 38% 20% 3	570
October	1st to 10th	Night	9% 4 31% 35% 19% 2	575
	11th to 20th	Night	10% 9% 41% 31% 9%	760
	21st to end	Night	12% 11% 35% 31% 11%	836
November	1st to 10th	Night	10% 9% 37% 34% 9% 1	923
	11th to 20th	Night	10% 13% 36% 34% 7% 1	1000
	21st to end	Night	13% 13% 33% 32% 9%	1000
December	1st to 10th	Night	11% 10% 37% 34% 7% 1	1000
	11th to 20th	Night	15% 12% 38% 30% 6%	1000
	21st to end	Night	14% 14% 35% 32% 6%	1100

Page generated at 2025-04-08 08:17:27. Version ac07

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