Kissimmee Prairie Preserve State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kissimmee Prairie Preserve State Park clear sky chart from 2005-11-06 to 2025-04-26.

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	7% 5% 2 7% 6% 6% 6% 5% 7% 9% 38%	113860
	Night	8% 6% 2 7% 5% 5% 5% 4 7% 9% 43%	114764
Transparency	Day	39% 9% 16% 19% 13% 4	117599
	Night	35% 8% 17% 21% 13% 5%	119164
Seeing	Day	8% 3 15% 25% 25% 23%	16349
	Night	9% 3 15% 34% 30% 9%	26515

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	6% 5% 3 6% 4 4 4 4 5% 8% 52%	4056
	11th to 20th	Day	16% 9% 3 8% 5% 5% 5% 4 6% 8% 31%	4060
	21st to end	Day	14% 7% 2 6% 4 4 4 3 6% 7% 41%	4576
February	1st to 10th	Day	10% 5% 2 7% 5% 4 5% 4 6% 8% 44%	2000
	11th to 20th	Day	6% 4 2 5% 5% 4 4 4 7% 8% 52%	1963
	21st to end	Day	8% 5% 2 5% 5% 4 4 4 6% 8% 49%	1815
March	1st to 10th	Day	6% 5% 2 7% 5% 6% 6% 4 6% 8% 44%	4935
	11th to 20th	Day	3 2 1 4 3 4 4 3 5% 8% 62%	4980
	21st to end	Day	8% 4 2 6% 5% 5% 5% 4 7% 8% 47%	5465
April	1st to 10th	Day	5% 3 2 5% 5% 5% 7% 4 7% 9% 47%	2200
	11th to 20th	Day	7% 5% 2 6% 6% 6% 5% 4 6% 8% 43%	2239
	21st to end	Day	6% 3 2 5% 6% 6% 6% 4 8% 9% 46%	2340
May	1st to 10th	Day	3 2 1 4 4 5% 5% 4 7% 10% 55%	3797
	11th to 20th	Day	6% 5% 2 8% 5% 6% 6% 6% 8% 11% 36%	4081
	21st to end	Day	4 4 2 5% 5% 5% 5% 4 7% 8% 51%	4476
June	1st to 10th	Day	13% 9% 3 11% 8% 7% 7% 6% 7% 10% 20%	2470
	11th to 20th	Day	7% 7% 3 9% 9% 7% 8% 7% 8% 11% 25%	2470
	21st to end	Day	9% 8% 4 9% 9% 8% 8% 5% 8% 9% 24%	2470
July	1st to 10th	Day	7% 6% 2 9% 9% 8% 7% 6% 9% 12% 24%	4120
	11th to 20th	Day	5% 5% 3 10% 8% 8% 8% 7% 9% 13% 24%	4120
	21st to end	Day	6% 6% 3 10% 9% 8% 8% 7% 10% 12% 23%	4466
August	1st to 10th	Day	4 6% 3 11% 8% 9% 9% 7% 10% 13% 22%	4104
	11th to 20th	Day	4 4 2 7% 7% 7% 7% 6% 9% 13% 34%	3805
	21st to end	Day	6% 5% 3 11% 8% 9% 8% 7% 9% 12% 22%	3828
September	1st to 10th	Day	8% 7% 3 10% 8% 7% 9% 6% 8% 11% 22%	2090
	11th to 20th	Day	8% 8% 3 11% 8% 8% 8% 7% 8% 10% 21%	2090
	21st to end	Day	9% 8% 3 10% 7% 7% 7% 7% 9% 9% 26%	2090
October	1st to 10th	Day	11% 6% 3 8% 6% 7% 6% 5% 7% 10% 32%	2038
	11th to 20th	Day	6% 6% 3 7% 5% 6% 6% 5% 7% 9% 40%	1900
	21st to end	Day	8% 6% 2 6% 6% 4 5% 4 7% 9% 45%	2090
November	1st to 10th	Day	7% 5% 1 6% 6% 5% 5% 4 7% 9% 44%	1957
	11th to 20th	Day	9% 7% 3 7% 7% 5% 5% 4 7% 8% 40%	2000
	21st to end	Day	9% 6% 2 7% 5% 5% 5% 5% 6% 9% 43%	2000
December	1st to 10th	Day	5% 4 2 5% 4 4 4 4 6% 7% 57%	2930
	11th to 20th	Day	9% 6% 3 7% 5% 5% 7% 6% 7% 8% 37%	3373
	21st to end	Day	9% 7% 3 9% 6% 6% 7% 5% 6% 9% 35%	4466
January	1st to 10th	Night	7% 5% 2 6% 4 4 4 4 6% 9% 50%	5889
	11th to 20th	Night	15% 12% 4 9% 5% 4 4 3 6% 7% 30%	5900
	21st to end	Night	15% 6% 2 6% 4 3 5% 4 6% 7% 44%	6375
February	1st to 10th	Night	10% 6% 2 6% 5% 4 4 4 5% 8% 45%	2400
	11th to 20th	Night	9% 5% 2 5% 3 4 4 4 6% 7% 51%	2321
	21st to end	Night	6% 4 2 4 3 4 3 4 6% 8% 55%	1815
March	1st to 10th	Night	7% 7% 3 6% 4 4 4 3 6% 8% 48%	4918
	11th to 20th	Night	4 3 1 4 3 3 4 4 7% 9% 58%	4980
	21st to end	Night	7% 5% 2 6% 4 4 4 4 6% 7% 52%	5467
April	1st to 10th	Night	4 4 1 4 5% 3 4 4 6% 10% 56%	2200
	11th to 20th	Night	5% 4 2 5% 4 4 4 3 6% 10% 52%	2107
	21st to end	Night	5% 3 1 5% 4 5% 4 4 5% 8% 54%	1957
May	1st to 10th	Night	4 3 1 4 4 4 4 3 6% 8% 58%	3112
	11th to 20th	Night	6% 4 2 5% 4 5% 5% 5% 7% 10% 46%	2812
	21st to end	Night	4 4 2 5% 4 4 5% 4 7% 9% 53%	3079
June	1st to 10th	Night	9% 9% 3 8% 6% 6% 6% 5% 7% 9% 32%	1710
	11th to 20th	Night	6% 6% 3 7% 7% 6% 6% 7% 8% 12% 31%	1710
	21st to end	Night	6% 6% 3 9% 6% 5% 7% 5% 8% 11% 33%	1710
July	1st to 10th	Night	7% 6% 2 7% 5% 5% 6% 6% 9% 13% 34%	2840
	11th to 20th	Night	5% 5% 2 7% 6% 7% 8% 6% 10% 15% 29%	2840
	21st to end	Night	5% 8% 3 10% 7% 6% 7% 6% 10% 11% 27%	3087
August	1st to 10th	Night	4 6% 3 8% 6% 6% 7% 6% 9% 11% 35%	2825
	11th to 20th	Night	5% 5% 3 7% 5% 6% 6% 5% 9% 12% 36%	2984
	21st to end	Night	6% 5% 2 8% 5% 6% 7% 6% 10% 14% 29%	3828
September	1st to 10th	Night	7% 7% 3 8% 7% 6% 8% 7% 9% 12% 26%	2090
	11th to 20th	Night	8% 7% 4 10% 6% 7% 6% 5% 8% 10% 29%	2090
	21st to end	Night	10% 7% 3 8% 7% 5% 6% 5% 7% 10% 31%	2090
October	1st to 10th	Night	12% 7% 3 7% 4 4 5% 5% 7% 9% 37%	2142
	11th to 20th	Night	6% 6% 3 7% 5% 4 5% 5% 6% 8% 47%	2280
	21st to end	Night	9% 6% 2 5% 4 4 4 4 5% 8% 48%	2508
November	1st to 10th	Night	7% 5% 2 6% 5% 4 4 4 6% 8% 48%	2341
	11th to 20th	Night	7% 6% 2 6% 5% 4 5% 4 7% 8% 46%	2400
	21st to end	Night	9% 6% 2 6% 5% 4 4 4 6% 8% 47%	2400
December	1st to 10th	Night	6% 4 1 4 3 3 3 3 6% 7% 60%	4245
	11th to 20th	Night	10% 7% 3 8% 5% 5% 4 4 6% 7% 42%	4822
	21st to end	Night	11% 8% 3 8% 6% 5% 6% 4 6% 8% 35%	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	31% 4 8% 21% 27% 9%	4057
	11th to 20th	Day	50% 4 10% 17% 15% 3	4060
	21st to end	Day	41% 4 7% 28% 15% 5%	4576
February	1st to 10th	Day	36% 5% 10% 20% 21% 8%	2000
	11th to 20th	Day	28% 6% 11% 24% 21% 11%	1973
	21st to end	Day	32% 5% 10% 19% 24% 9%	1815
March	1st to 10th	Day	37% 6% 13% 19% 19% 7%	4935
	11th to 20th	Day	21% 4 12% 24% 23% 17%	4980
	21st to end	Day	33% 6% 10% 26% 16% 8%	5465
April	1st to 10th	Day	30% 7% 14% 25% 18% 6%	2200
	11th to 20th	Day	35% 7% 10% 19% 20% 7%	2239
	21st to end	Day	30% 7% 12% 22% 23% 6%	2340
May	1st to 10th	Day	20% 8% 15% 33% 19% 5%	3832
	11th to 20th	Day	37% 9% 21% 20% 12% 1	4085
	21st to end	Day	28% 7% 14% 33% 16% 1	4489
June	1st to 10th	Day	56% 9% 18% 14% 4	2470
	11th to 20th	Day	49% 11% 21% 17% 3	2470
	21st to end	Day	53% 11% 22% 11% 2	2470
July	1st to 10th	Day	46% 13% 27% 12% 3	4055
	11th to 20th	Day	46% 15% 31% 8%	4051
	21st to end	Day	46% 16% 26% 12%	4324
August	1st to 10th	Day	46% 15% 30% 8% 1	4091
	11th to 20th	Day	37% 14% 29% 13% 7%	3844
	21st to end	Day	48% 16% 27% 8% 2	3828
September	1st to 10th	Day	52% 14% 21% 12% 1	2090
	11th to 20th	Day	54% 12% 19% 12% 2	2090
	21st to end	Day	50% 12% 17% 12% 9% 1	2090
October	1st to 10th	Day	53% 10% 16% 12% 6% 3	3389
	11th to 20th	Day	33% 7% 11% 23% 22% 4	3140
	21st to end	Day	32% 6% 10% 23% 24% 5%	3428
November	1st to 10th	Day	35% 6% 13% 19% 17% 9%	1957
	11th to 20th	Day	41% 5% 10% 21% 15% 8%	2000
	21st to end	Day	37% 6% 10% 21% 18% 8%	2000
December	1st to 10th	Day	26% 5% 17% 28% 15% 9%	2930
	11th to 20th	Day	40% 7% 11% 19% 16% 8%	3370
	21st to end	Day	43% 7% 14% 19% 13% 3	4466
January	1st to 10th	Night	30% 4 10% 24% 22% 9%	5889
	11th to 20th	Night	53% 4 11% 19% 10% 3	5900
	21st to end	Night	40% 5% 9% 24% 16% 6%	6375
February	1st to 10th	Night	35% 7% 11% 19% 20% 8%	2400
	11th to 20th	Night	30% 5% 11% 24% 22% 9%	2322
	21st to end	Night	25% 5% 13% 22% 27% 7%	1815
March	1st to 10th	Night	35% 5% 13% 22% 20% 7%	4918
	11th to 20th	Night	21% 5% 17% 25% 17% 14%	4980
	21st to end	Night	30% 6% 12% 27% 21% 4	5467
April	1st to 10th	Night	24% 4 20% 29% 17% 7%	2200
	11th to 20th	Night	25% 8% 16% 23% 22% 6%	2107
	21st to end	Night	26% 6% 14% 26% 22% 5%	1957
May	1st to 10th	Night	20% 8% 19% 33% 15% 5%	3142
	11th to 20th	Night	29% 8% 22% 31% 9% 1	2813
	21st to end	Night	23% 9% 16% 37% 14%	3087
June	1st to 10th	Night	46% 8% 25% 17% 4	1710
	11th to 20th	Night	42% 11% 25% 20% 3	1710
	21st to end	Night	41% 15% 25% 16% 3	1710
July	1st to 10th	Night	37% 13% 30% 18% 1	2795
	11th to 20th	Night	38% 16% 37% 9% 1	2786
	21st to end	Night	42% 14% 29% 14% 1	2988
August	1st to 10th	Night	38% 14% 34% 12% 2	2814
	11th to 20th	Night	35% 15% 30% 12% 8%	3011
	21st to end	Night	40% 16% 34% 9% 1	3828
September	1st to 10th	Night	43% 17% 25% 13% 1	2090
	11th to 20th	Night	46% 14% 22% 16% 2	2090
	21st to end	Night	45% 11% 20% 16% 8% 1	2090
October	1st to 10th	Night	54% 11% 15% 11% 8% 2	3571
	11th to 20th	Night	33% 6% 12% 24% 22% 3	3779
	21st to end	Night	32% 5% 10% 25% 21% 6%	4120
November	1st to 10th	Night	32% 6% 12% 22% 20% 8%	2341
	11th to 20th	Night	32% 7% 13% 27% 14% 7%	2400
	21st to end	Night	35% 5% 11% 21% 21% 7%	2400
December	1st to 10th	Night	24% 5% 16% 32% 13% 11%	4245
	11th to 20th	Night	40% 6% 13% 18% 15% 8%	4824
	21st to end	Night	44% 7% 15% 18% 11% 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	8% 7% 39% 28% 16% 2	300
	11th to 20th	Day	11% 8% 33% 30% 11% 7%	300
	21st to end	Day	15% 7% 41% 27% 8% 1	330
February	1st to 10th	Day	10% 8% 22% 36% 18% 6%	300
	11th to 20th	Day	9% 3 31% 33% 18% 6%	315
	21st to end	Day	8% 5% 22% 36% 24% 5%	414
March	1st to 10th	Day	6% 5% 32% 36% 19% 2	500
	11th to 20th	Day	7% 4 27% 31% 26% 5%	500
	21st to end	Day	6% 3 25% 34% 25% 6%	550
April	1st to 10th	Day	6% 5% 27% 34% 21% 6%	500
	11th to 20th	Day	6% 4 23% 34% 24% 9%	492
	21st to end	Day	6% 2 15% 34% 29% 13%	480
May	1st to 10th	Day	5% 17% 26% 33% 19%	463
	11th to 20th	Day	10% 2 13% 27% 30% 18%	487
	21st to end	Day	8% 1 5% 22% 30% 34%	529
June	1st to 10th	Day	15% 2 6% 16% 31% 30%	490
	11th to 20th	Day	8% 1 5% 16% 29% 41%	490
	21st to end	Day	8% 2 1 12% 23% 53%	490
July	1st to 10th	Day	9% 1 1 8% 23% 58%	485
	11th to 20th	Day	5% 1 1 8% 29% 56%	484
	21st to end	Day	9% 2 2 13% 21% 53%	532
August	1st to 10th	Day	6% 1 3 13% 24% 53%	486
	11th to 20th	Day	4 1 1 8% 28% 58%	479
	21st to end	Day	8% 3 3 16% 28% 42%	539
September	1st to 10th	Day	9% 2 3 12% 25% 49%	490
	11th to 20th	Day	10% 2 2 15% 29% 41%	490
	21st to end	Day	9% 1 5% 19% 31% 35%	490
October	1st to 10th	Day	15% 1 8% 29% 34% 14%	490
	11th to 20th	Day	7% 2 16% 32% 32% 12%	490
	21st to end	Day	9% 2 15% 33% 32% 9%	539
November	1st to 10th	Day	9% 3 17% 31% 29% 11%	495
	11th to 20th	Day	13% 3 18% 37% 23% 6%	500
	21st to end	Day	9% 3 19% 37% 26% 6%	500
December	1st to 10th	Day	5% 6% 30% 32% 18% 9%	300
	11th to 20th	Day	10% 6% 26% 35% 18% 5%	300
	21st to end	Day	8% 5% 25% 38% 19% 5%	330
January	1st to 10th	Night	11% 5% 28% 38% 18% 1	800
	11th to 20th	Night	12% 5% 29% 38% 15% 1	800
	21st to end	Night	15% 5% 28% 40% 12%	880
February	1st to 10th	Night	13% 5% 24% 42% 16%	800
	11th to 20th	Night	11% 4 27% 42% 15% 1	783
	21st to end	Night	8% 3 26% 48% 14% 1	660
March	1st to 10th	Night	8% 4 32% 43% 14%	800
	11th to 20th	Night	8% 4 26% 42% 20% 1	800
	21st to end	Night	6% 3 27% 47% 17%	880
April	1st to 10th	Night	5% 3 28% 47% 17% 1	800
	11th to 20th	Night	7% 3 24% 46% 19% 1	791
	21st to end	Night	6% 3 22% 47% 21% 1	783
May	1st to 10th	Night	6% 1 18% 48% 24% 3	755
	11th to 20th	Night	9% 1 9% 42% 35% 4	561
	21st to end	Night	8% 1 4 31% 48% 8%	617
June	1st to 10th	Night	12% 1 2 28% 47% 10%	570
	11th to 20th	Night	8% 2 3 16% 47% 24%	570
	21st to end	Night	8% 1 11% 49% 31%	570
July	1st to 10th	Night	11% 2 1 6% 48% 32%	555
	11th to 20th	Night	6% 1 1 7% 47% 38%	552
	21st to end	Night	5% 1 9% 48% 37%	624
August	1st to 10th	Night	6% 2 2 9% 50% 32%	567
	11th to 20th	Night	8% 2 8% 49% 33%	665
	21st to end	Night	11% 1 4 15% 44% 25%	836
September	1st to 10th	Night	10% 2 2 14% 46% 25%	760
	11th to 20th	Night	11% 2 3 19% 47% 19%	760
	21st to end	Night	14% 1 4 22% 43% 15%	760
October	1st to 10th	Night	16% 2 7% 35% 34% 7%	760
	11th to 20th	Night	9% 2 9% 34% 42% 4	760
	21st to end	Night	12% 2 12% 39% 31% 4	836
November	1st to 10th	Night	10% 3 17% 38% 29% 3	780
	11th to 20th	Night	8% 2 18% 45% 24% 3	800
	21st to end	Night	9% 2 20% 45% 23% 1	800
December	1st to 10th	Night	8% 3 20% 42% 25% 3	800
	11th to 20th	Night	10% 4 18% 42% 23% 3	800
	21st to end	Night	10% 3 22% 40% 24% 1	880

Page generated at 2025-04-23 09:25:01. Version ac07

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