Conecuh National Forest
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Conecuh National Forest clear sky chart from 2005-11-06 to 2025-10-04.

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	11% 6% 2 6% 5% 5% 5% 4 6% 8% 42%	125908
	Night	11% 6% 2 6% 4 4 4 4 6% 8% 44%	123504
Transparency	Day	23% 40% 9% 12% 11% 5%	129787
	Night	24% 40% 8% 11% 12% 5%	127698
Seeing	Day	14% 9% 22% 25% 20% 11%	15824
	Night	13% 8% 22% 29% 22% 5%	25718

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	13% 5% 2 5% 3 3 3 3 4 7% 52%	4056
	11th to 20th	Day	13% 5% 2 4 3 3 4 3 5% 6% 51%	4520
	21st to end	Day	21% 6% 2 6% 4 3 4 3 4 7% 40%	4972
February	1st to 10th	Day	16% 7% 2 7% 4 4 4 3 5% 6% 42%	2000
	11th to 20th	Day	16% 7% 2 5% 4 3 4 3 5% 6% 45%	1948
	21st to end	Day	16% 7% 2 6% 5% 5% 5% 3 6% 5% 40%	1650
March	1st to 10th	Day	16% 8% 3 6% 4 5% 4 4 6% 6% 39%	4480
	11th to 20th	Day	9% 5% 2 5% 4 4 4 3 5% 6% 53%	4796
	21st to end	Day	15% 6% 3 6% 4 4 4 3 5% 6% 43%	5682
April	1st to 10th	Day	12% 6% 2 6% 4 4 4 3 5% 7% 47%	2400
	11th to 20th	Day	12% 5% 2 6% 5% 5% 4 3 5% 6% 46%	2374
	21st to end	Day	8% 4 2 5% 5% 4 5% 4 6% 7% 51%	2400
May	1st to 10th	Day	13% 7% 2 7% 5% 5% 5% 4 6% 7% 38%	5579
	11th to 20th	Day	11% 5% 2 7% 4 4 5% 5% 6% 10% 42%	5861
	21st to end	Day	6% 4 2 6% 5% 5% 5% 5% 7% 10% 43%	6433
June	1st to 10th	Day	9% 6% 3 8% 7% 7% 6% 6% 9% 9% 30%	2600
	11th to 20th	Day	6% 4 2 6% 6% 7% 7% 6% 9% 11% 35%	2600
	21st to end	Day	7% 6% 2 7% 7% 6% 8% 7% 9% 11% 29%	2600
July	1st to 10th	Day	6% 6% 3 9% 7% 8% 8% 7% 9% 13% 25%	5900
	11th to 20th	Day	4 4 2 7% 7% 7% 8% 7% 10% 13% 32%	5900
	21st to end	Day	5% 5% 2 8% 7% 9% 8% 7% 10% 14% 24%	5928
August	1st to 10th	Day	5% 4 2 5% 5% 6% 7% 7% 9% 13% 37%	3905
	11th to 20th	Day	6% 5% 2 7% 5% 5% 6% 4 6% 8% 46%	3849
	21st to end	Day	7% 5% 2 7% 6% 7% 7% 6% 8% 11% 34%	4312
September	1st to 10th	Day	10% 8% 3 7% 6% 5% 6% 5% 7% 8% 35%	2325
	11th to 20th	Day	12% 6% 3 7% 6% 6% 6% 4 5% 6% 39%	2200
	21st to end	Day	9% 5% 2 7% 5% 5% 5% 4 5% 7% 49%	2200
October	1st to 10th	Day	9% 4 2 6% 4 4 4 3 5% 7% 53%	2123
	11th to 20th	Day	10% 4 1 5% 3 3 3 2 5% 6% 58%	2090
	21st to end	Day	9% 5% 2 4 4 4 3 2 4 5% 57%	2094
November	1st to 10th	Day	9% 5% 2 4 3 3 3 4 5% 6% 55%	1762
	11th to 20th	Day	11% 5% 2 5% 4 4 3 4 4 7% 53%	1800
	21st to end	Day	13% 4 2 5% 4 4 4 3 5% 7% 49%	1800
December	1st to 10th	Day	16% 6% 2 4 3 3 3 2 4 6% 51%	2930
	11th to 20th	Day	11% 7% 3 5% 3 4 3 3 4 6% 52%	3373
	21st to end	Day	19% 8% 2 5% 3 3 3 2 4 5% 46%	4466
January	1st to 10th	Night	15% 5% 3 5% 4 4 4 3 4 5% 48%	5871
	11th to 20th	Night	16% 9% 3 6% 3 3 3 3 4 5% 45%	5440
	21st to end	Night	19% 9% 2 5% 4 4 4 4 5% 7% 39%	5984
February	1st to 10th	Night	15% 9% 3 6% 4 3 4 3 5% 6% 43%	2400
	11th to 20th	Night	19% 8% 2 5% 3 2 3 3 5% 5% 45%	2338
	21st to end	Night	16% 9% 2 5% 4 4 4 4 5% 5% 43%	1980
March	1st to 10th	Night	22% 10% 3 6% 3 3 3 3 5% 6% 35%	5373
	11th to 20th	Night	13% 7% 2 5% 3 4 4 3 4 6% 49%	5164
	21st to end	Night	13% 7% 3 6% 4 3 4 3 5% 6% 48%	5287
April	1st to 10th	Night	12% 7% 2 6% 4 3 4 4 6% 8% 45%	2000
	11th to 20th	Night	13% 5% 2 5% 4 3 4 3 6% 8% 48%	1975
	21st to end	Night	6% 3 2 5% 4 4 3 3 6% 7% 58%	2000
May	1st to 10th	Night	12% 7% 3 7% 4 4 5% 4 6% 8% 40%	4312
	11th to 20th	Night	13% 6% 2 5% 4 4 4 4 6% 9% 41%	4032
	21st to end	Night	6% 4 2 5% 4 4 5% 3 8% 12% 45%	4421
June	1st to 10th	Night	9% 5% 2 7% 4 6% 6% 4 9% 10% 38%	1800
	11th to 20th	Night	5% 4 1 4 5% 4 6% 6% 9% 13% 44%	1800
	21st to end	Night	5% 5% 2 7% 6% 5% 5% 5% 9% 12% 40%	1800
July	1st to 10th	Night	5% 6% 2 7% 6% 7% 7% 8% 11% 14% 27%	4058
	11th to 20th	Night	3 4 2 5% 5% 7% 7% 7% 9% 16% 36%	4057
	21st to end	Night	3 4 2 7% 6% 6% 8% 7% 11% 14% 30%	4918
August	1st to 10th	Night	4 4 2 6% 4 5% 7% 5% 9% 13% 40%	3244
	11th to 20th	Night	4 3 2 5% 5% 5% 5% 5% 8% 12% 47%	3200
	21st to end	Night	5% 5% 2 7% 6% 6% 7% 6% 9% 11% 36%	3586
September	1st to 10th	Night	9% 7% 2 6% 5% 5% 6% 5% 7% 11% 36%	2054
	11th to 20th	Night	11% 6% 2 7% 5% 5% 5% 4 6% 9% 40%	2200
	21st to end	Night	9% 5% 2 6% 5% 4 4 4 6% 7% 49%	2200
October	1st to 10th	Night	8% 4 2 5% 3 4 4 3 6% 7% 54%	2124
	11th to 20th	Night	8% 5% 1 3 2 2 3 3 5% 6% 61%	2090
	21st to end	Night	10% 5% 2 4 3 3 4 2 4 5% 57%	2498
November	1st to 10th	Night	9% 5% 2 4 3 2 4 3 4 7% 57%	2536
	11th to 20th	Night	11% 6% 2 4 3 2 3 3 5% 7% 54%	2600
	21st to end	Night	13% 6% 2 4 3 4 4 4 5% 6% 50%	2600
December	1st to 10th	Night	14% 6% 2 5% 3 3 3 3 5% 7% 51%	4250
	11th to 20th	Night	14% 5% 2 4 3 4 3 3 4 6% 52%	4822
	21st to end	Night	18% 7% 2 6% 4 3 3 3 3 4 46%	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	23% 27% 5% 14% 25% 6%	4057
	11th to 20th	Day	25% 26% 3 12% 26% 8%	4520
	21st to end	Day	34% 29% 6% 10% 11% 10%	4972
February	1st to 10th	Day	19% 62% 2 5% 8% 4	2000
	11th to 20th	Day	17% 61% 2 8% 9% 3	1958
	21st to end	Day	18% 62% 4 5% 6% 6%	1650
March	1st to 10th	Day	34% 30% 6% 10% 12% 7%	4480
	11th to 20th	Day	22% 29% 5% 11% 15% 18%	4796
	21st to end	Day	32% 29% 7% 11% 12% 8%	5684
April	1st to 10th	Day	15% 62% 3 7% 7% 6%	2400
	11th to 20th	Day	16% 62% 3 7% 8% 4	2374
	21st to end	Day	14% 63% 5% 8% 7% 4	2400
May	1st to 10th	Day	34% 31% 8% 16% 10% 2	5614
	11th to 20th	Day	28% 31% 12% 20% 8% 1	5865
	21st to end	Day	24% 31% 11% 20% 12% 2	6447
June	1st to 10th	Day	19% 63% 7% 7% 4	2600
	11th to 20th	Day	18% 65% 6% 6% 4 1	2600
	21st to end	Day	18% 64% 7% 7% 4 1	2600
July	1st to 10th	Day	30% 37% 21% 11% 1	5835
	11th to 20th	Day	23% 38% 27% 11% 1	5831
	21st to end	Day	32% 37% 17% 12% 2	5757
August	1st to 10th	Day	18% 41% 12% 17% 12% 2	3893
	11th to 20th	Day	16% 39% 10% 18% 16% 1	3885
	21st to end	Day	20% 42% 17% 12% 7%	4311
September	1st to 10th	Day	19% 60% 7% 5% 7% 2	2325
	11th to 20th	Day	16% 58% 6% 10% 8% 2	2200
	21st to end	Day	14% 58% 6% 12% 7% 2	2200
October	1st to 10th	Day	20% 37% 3 7% 11% 23%	3513
	11th to 20th	Day	8% 36% 3 10% 14% 29%	3458
	21st to end	Day	10% 37% 2 10% 28% 13%	3434
November	1st to 10th	Day	18% 56% 4 8% 8% 6%	1762
	11th to 20th	Day	17% 57% 4 7% 11% 6%	1800
	21st to end	Day	14% 57% 3 11% 9% 6%	1800
December	1st to 10th	Day	25% 35% 3 11% 19% 6%	2930
	11th to 20th	Day	20% 32% 4 18% 18% 8%	3370
	21st to end	Day	32% 27% 3 12% 22% 4	4466
January	1st to 10th	Night	29% 26% 3 10% 24% 8%	5871
	11th to 20th	Night	33% 26% 3 8% 23% 7%	5440
	21st to end	Night	34% 29% 5% 12% 15% 6%	5984
February	1st to 10th	Night	17% 62% 3 6% 9% 3	2400
	11th to 20th	Night	17% 61% 3 6% 9% 4	2339
	21st to end	Night	17% 62% 4 5% 6% 6%	1980
March	1st to 10th	Night	42% 29% 4 8% 13% 4	5373
	11th to 20th	Night	28% 29% 5% 8% 15% 16%	5164
	21st to end	Night	29% 29% 6% 16% 10% 10%	5287
April	1st to 10th	Night	16% 62% 4 5% 7% 6%	2000
	11th to 20th	Night	14% 62% 2 8% 8% 5%	1975
	21st to end	Night	10% 63% 5% 10% 8% 3	2000
May	1st to 10th	Night	33% 30% 15% 12% 7% 2	4342
	11th to 20th	Night	29% 31% 12% 18% 9% 1	4033
	21st to end	Night	22% 31% 15% 22% 9% 1	4429
June	1st to 10th	Night	16% 64% 7% 8% 4 1	1800
	11th to 20th	Night	11% 66% 11% 7% 5% 1	1800
	21st to end	Night	13% 65% 11% 6% 4 1	1800
July	1st to 10th	Night	31% 36% 23% 9% 1	4015
	11th to 20th	Night	23% 36% 31% 9%	4006
	21st to end	Night	30% 40% 15% 14% 2	4775
August	1st to 10th	Night	20% 41% 14% 15% 10%	3232
	11th to 20th	Night	13% 41% 15% 18% 13%	3230
	21st to end	Night	20% 42% 17% 13% 7% 1	3586
September	1st to 10th	Night	15% 61% 9% 7% 5% 3	2054
	11th to 20th	Night	15% 59% 7% 9% 9% 2	2200
	21st to end	Night	13% 59% 7% 11% 7% 2	2200
October	1st to 10th	Night	24% 38% 6% 6% 12% 14%	3514
	11th to 20th	Night	5% 36% 2 12% 18% 28%	3461
	21st to end	Night	10% 37% 2 9% 30% 12%	4108
November	1st to 10th	Night	17% 57% 5% 8% 10% 4	2536
	11th to 20th	Night	17% 56% 3 8% 12% 5%	2600
	21st to end	Night	15% 57% 4 9% 10% 6%	2600
December	1st to 10th	Night	24% 36% 4 13% 17% 7%	4250
	11th to 20th	Night	21% 32% 4 18% 18% 7%	4824
	21st to end	Night	33% 26% 4 12% 23% 2	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	21% 21% 38% 14% 4	300
	11th to 20th	Day	19% 17% 38% 18% 7% 1	300
	21st to end	Day	26% 21% 37% 14% 2	330
February	1st to 10th	Day	25% 19% 34% 16% 6%	300
	11th to 20th	Day	26% 23% 33% 16% 2	300
	21st to end	Day	17% 26% 39% 14% 3	249
March	1st to 10th	Day	19% 24% 38% 14% 4	300
	11th to 20th	Day	20% 19% 34% 20% 7% 1	420
	21st to end	Day	19% 16% 33% 23% 8% 1	550
April	1st to 10th	Day	22% 16% 31% 19% 11% 2	500
	11th to 20th	Day	16% 14% 31% 24% 12% 2	492
	21st to end	Day	10% 10% 30% 29% 17% 4	500
May	1st to 10th	Day	10% 11% 28% 26% 19% 7%	503
	11th to 20th	Day	8% 6% 24% 31% 19% 11%	527
	21st to end	Day	9% 3 23% 31% 20% 13%	573
June	1st to 10th	Day	12% 3 15% 31% 25% 14%	530
	11th to 20th	Day	7% 5% 12% 30% 26% 19%	530
	21st to end	Day	8% 3 11% 27% 28% 23%	530
July	1st to 10th	Day	8% 2 6% 25% 32% 26%	525
	11th to 20th	Day	6% 2 4 20% 36% 32%	524
	21st to end	Day	6% 2 8% 23% 36% 25%	576
August	1st to 10th	Day	8% 1 6% 20% 35% 30%	526
	11th to 20th	Day	9% 1 7% 20% 35% 28%	519
	21st to end	Day	10% 2 10% 32% 26% 20%	583
September	1st to 10th	Day	11% 2 12% 28% 28% 19%	530
	11th to 20th	Day	15% 4 11% 29% 33% 9%	530
	21st to end	Day	11% 3 14% 31% 30% 12%	530
October	1st to 10th	Day	10% 5% 28% 33% 19% 5%	502
	11th to 20th	Day	9% 7% 20% 33% 23% 7%	490
	21st to end	Day	13% 10% 22% 33% 20% 2	425
November	1st to 10th	Day	16% 9% 28% 32% 11% 4	300
	11th to 20th	Day	15% 16% 34% 27% 7% 1	300
	21st to end	Day	15% 17% 35% 21% 12% 1	300
December	1st to 10th	Day	20% 16% 34% 22% 6% 2	300
	11th to 20th	Day	25% 16% 34% 18% 7%	300
	21st to end	Day	27% 13% 31% 20% 9% 1	330
January	1st to 10th	Night	20% 16% 34% 25% 6%	800
	11th to 20th	Night	19% 16% 26% 30% 9%	800
	21st to end	Night	22% 16% 34% 25% 4	880
February	1st to 10th	Night	19% 12% 35% 27% 6% 1	800
	11th to 20th	Night	24% 15% 29% 25% 7%	783
	21st to end	Night	20% 16% 36% 25% 3	660
March	1st to 10th	Night	18% 13% 34% 28% 7%	800
	11th to 20th	Night	16% 14% 32% 28% 10% 1	800
	21st to end	Night	13% 14% 32% 32% 9%	803
April	1st to 10th	Night	16% 11% 26% 37% 11%	600
	11th to 20th	Night	14% 9% 31% 29% 16% 1	593
	21st to end	Night	6% 7% 29% 40% 18% 1	600
May	1st to 10th	Night	9% 5% 26% 38% 20% 2	600
	11th to 20th	Night	10% 3 20% 35% 28% 5%	591
	21st to end	Night	9% 2 13% 37% 34% 5%	650
June	1st to 10th	Night	10% 2 11% 34% 36% 7%	600
	11th to 20th	Night	5% 2 8% 32% 42% 12%	600
	21st to end	Night	5% 1 10% 28% 44% 13%	600
July	1st to 10th	Night	5% 2 5% 24% 48% 17%	585
	11th to 20th	Night	7% 1 4 19% 43% 26%	582
	21st to end	Night	3 1 4 24% 51% 17%	657
August	1st to 10th	Night	6% 2 4 18% 47% 23%	597
	11th to 20th	Night	7% 1 3 22% 45% 21%	594
	21st to end	Night	10% 2 7% 24% 42% 15%	660
September	1st to 10th	Night	10% 4 8% 26% 38% 14%	654
	11th to 20th	Night	13% 2 14% 30% 35% 6%	800
	21st to end	Night	10% 2 15% 31% 36% 6%	800
October	1st to 10th	Night	9% 3 28% 33% 24% 3	773
	11th to 20th	Night	10% 6% 22% 32% 27% 3	760
	21st to end	Night	14% 6% 23% 33% 22% 1	836
November	1st to 10th	Night	12% 5% 26% 37% 17% 3	780
	11th to 20th	Night	16% 10% 27% 33% 14% 1	800
	21st to end	Night	16% 11% 26% 32% 14% 1	800
December	1st to 10th	Night	18% 11% 28% 29% 14%	800
	11th to 20th	Night	19% 10% 31% 29% 12%	800
	21st to end	Night	24% 11% 28% 27% 9%	880

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