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 2026-08-30.

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% 8% 10% 38%	143125
	Night	7% 6% 2 7% 5% 5% 5% 4 7% 9% 43%	139095
Transparency	Day	38% 9% 18% 19% 12% 4	146820
	Night	35% 8% 19% 21% 12% 4	143472
Seeing	Day	8% 3 15% 25% 26% 23%	18232
	Night	9% 3 15% 33% 30% 9%	28283

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	5% 5% 2 5% 3 3 4 4 5% 8% 55%	5258
	11th to 20th	Day	16% 9% 3 8% 5% 5% 5% 4 6% 8% 33%	5280
	21st to end	Day	13% 6% 2 6% 4 4 4 4 6% 8% 43%	5918
February	1st to 10th	Day	10% 5% 2 6% 5% 4 5% 4 5% 8% 46%	2100
	11th to 20th	Day	5% 4 2 5% 5% 4 4 4 7% 8% 52%	2064
	21st to end	Day	8% 5% 2 5% 5% 4 4 4 6% 8% 49%	1903
March	1st to 10th	Day	6% 5% 2 7% 5% 6% 6% 4 6% 8% 44%	5045
	11th to 20th	Day	3 3 1 4 3 4 4 3 5% 8% 61%	5090
	21st to end	Day	7% 4 2 6% 5% 5% 5% 4 7% 8% 47%	5586
April	1st to 10th	Day	5% 4 2 5% 5% 5% 7% 4 7% 9% 46%	2310
	11th to 20th	Day	7% 5% 2 6% 6% 6% 5% 4 6% 8% 44%	2352
	21st to end	Day	5% 3 2 5% 6% 5% 6% 4 8% 10% 48%	2520
May	1st to 10th	Day	3 3 1 4 4 5% 6% 5% 8% 12% 48%	7080
	11th to 20th	Day	6% 5% 2 7% 5% 6% 6% 5% 7% 10% 42%	7626
	21st to end	Day	4 4 2 6% 6% 6% 8% 6% 9% 12% 38%	8391
June	1st to 10th	Day	13% 9% 3 11% 8% 7% 7% 6% 7% 10% 21%	2730
	11th to 20th	Day	7% 6% 3 9% 9% 7% 8% 7% 8% 12% 25%	2730
	21st to end	Day	8% 7% 4 9% 8% 7% 8% 5% 8% 9% 25%	2730
July	1st to 10th	Day	5% 5% 2 9% 8% 8% 8% 7% 10% 14% 25%	7680
	11th to 20th	Day	3 4 2 8% 7% 8% 8% 7% 10% 14% 29%	7680
	21st to end	Day	4 5% 2 8% 7% 7% 7% 6% 9% 15% 30%	8340
August	1st to 10th	Day	5% 6% 3 11% 8% 9% 9% 7% 10% 13% 21%	4364
	11th to 20th	Day	4 4 2 7% 7% 7% 7% 6% 9% 13% 35%	4050
	21st to end	Day	6% 5% 3 10% 8% 9% 8% 7% 9% 13% 22%	4048
September	1st to 10th	Day	8% 7% 3 10% 9% 8% 9% 6% 8% 11% 21%	2200
	11th to 20th	Day	8% 8% 4 11% 8% 8% 8% 6% 7% 10% 22%	2200
	21st to end	Day	8% 8% 3 9% 7% 7% 7% 7% 9% 9% 26%	2200
October	1st to 10th	Day	10% 6% 3 9% 6% 7% 6% 6% 7% 10% 31%	2145
	11th to 20th	Day	6% 6% 3 6% 5% 6% 6% 5% 7% 9% 42%	2000
	21st to end	Day	8% 5% 2 6% 6% 4 5% 4 7% 9% 45%	2200
November	1st to 10th	Day	7% 5% 1 6% 6% 5% 5% 4 7% 9% 45%	2057
	11th to 20th	Day	8% 6% 2 7% 6% 5% 5% 3 7% 8% 42%	2100
	21st to end	Day	8% 6% 2 7% 5% 5% 4 5% 6% 9% 44%	2100
December	1st to 10th	Day	5% 4 2 5% 4 4 4 4 6% 8% 56%	3020
	11th to 20th	Day	8% 6% 3 7% 5% 6% 6% 6% 7% 8% 37%	3463
	21st to end	Day	9% 7% 3 8% 6% 6% 6% 5% 6% 9% 35%	4565
January	1st to 10th	Night	6% 4 2 5% 3 3 3 3 5% 8% 56%	7635
	11th to 20th	Night	14% 11% 4 9% 5% 4 4 3 6% 7% 33%	7680
	21st to end	Night	12% 6% 2 6% 4 3 4 4 5% 7% 48%	8244
February	1st to 10th	Night	10% 6% 2 6% 5% 3 4 4 5% 7% 47%	2520
	11th to 20th	Night	9% 5% 2 5% 3 4 4 4 6% 7% 51%	2440
	21st to end	Night	6% 4 2 4 3 4 3 3 6% 8% 56%	1903
March	1st to 10th	Night	7% 7% 3 7% 4 4 4 3 6% 8% 48%	5028
	11th to 20th	Night	4 3 1 4 3 3 4 4 7% 9% 57%	5090
	21st to end	Night	7% 5% 2 6% 4 4 4 4 6% 7% 52%	5588
April	1st to 10th	Night	5% 4 1 4 4 3 4 4 6% 10% 55%	2310
	11th to 20th	Night	5% 4 2 5% 4 4 4 3 6% 10% 52%	2214
	21st to end	Night	5% 3 2 5% 4 5% 4 4 5% 8% 55%	2100
May	1st to 10th	Night	4 4 2 5% 4 5% 5% 4 7% 9% 50%	5801
	11th to 20th	Night	7% 6% 2 7% 4 4 5% 4 6% 8% 46%	5234
	21st to end	Night	5% 5% 2 7% 5% 5% 6% 5% 9% 11% 40%	5761
June	1st to 10th	Night	9% 10% 3 8% 6% 6% 6% 5% 7% 9% 31%	1890
	11th to 20th	Night	6% 6% 3 8% 7% 6% 7% 7% 8% 12% 30%	1890
	21st to end	Night	6% 6% 3 9% 6% 6% 7% 5% 8% 11% 33%	1890
July	1st to 10th	Night	7% 7% 3 9% 6% 6% 7% 6% 9% 12% 27%	5278
	11th to 20th	Night	4 5% 3 7% 6% 7% 7% 6% 10% 14% 32%	5277
	21st to end	Night	3 6% 3 8% 6% 6% 6% 6% 9% 12% 37%	5736
August	1st to 10th	Night	4 6% 3 8% 6% 6% 7% 6% 9% 11% 34%	3005
	11th to 20th	Night	5% 5% 3 7% 5% 6% 6% 5% 9% 12% 37%	3176
	21st to end	Night	6% 6% 3 8% 6% 6% 7% 6% 10% 14% 29%	4049
September	1st to 10th	Night	7% 7% 3 8% 7% 6% 8% 7% 9% 12% 25%	2200
	11th to 20th	Night	8% 8% 4 10% 6% 7% 6% 4 8% 10% 29%	2200
	21st to end	Night	10% 7% 3 8% 7% 6% 6% 5% 7% 10% 31%	2200
October	1st to 10th	Night	11% 7% 3 7% 5% 5% 5% 5% 7% 9% 37%	2255
	11th to 20th	Night	5% 6% 3 7% 5% 4 5% 5% 6% 7% 47%	2400
	21st to end	Night	9% 6% 2 6% 4 4 4 4 5% 8% 48%	2640
November	1st to 10th	Night	7% 5% 2 6% 5% 4 4 4 6% 8% 49%	2461
	11th to 20th	Night	7% 5% 2 6% 5% 4 4 4 7% 8% 48%	2520
	21st to end	Night	8% 6% 2 6% 4 4 4 4 6% 8% 47%	2520
December	1st to 10th	Night	6% 4 1 4 3 3 3 3 6% 7% 59%	4375
	11th to 20th	Night	9% 7% 3 8% 5% 4 4 4 6% 7% 42%	4952
	21st to end	Night	11% 8% 3 8% 6% 5% 5% 4 6% 8% 36%	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	27% 4 9% 27% 25% 8%	5259
	11th to 20th	Day	49% 4 9% 17% 15% 6%	5280
	21st to end	Day	40% 4 8% 26% 13% 9%	5918
February	1st to 10th	Day	35% 5% 10% 20% 21% 10%	2100
	11th to 20th	Day	27% 6% 11% 25% 21% 10%	2074
	21st to end	Day	31% 5% 10% 19% 25% 10%	1903
March	1st to 10th	Day	36% 6% 13% 19% 19% 7%	5045
	11th to 20th	Day	21% 4 11% 24% 23% 17%	5090
	21st to end	Day	33% 6% 10% 26% 17% 8%	5586
April	1st to 10th	Day	31% 7% 14% 25% 17% 6%	2310
	11th to 20th	Day	35% 7% 10% 19% 21% 8%	2352
	21st to end	Day	29% 7% 12% 23% 24% 6%	2520
May	1st to 10th	Day	24% 7% 20% 32% 14% 3	7112
	11th to 20th	Day	35% 8% 20% 24% 13% 1	7630
	21st to end	Day	32% 11% 23% 25% 9%	8405
June	1st to 10th	Day	55% 9% 18% 14% 4	2730
	11th to 20th	Day	47% 12% 22% 17% 2	2730
	21st to end	Day	51% 11% 23% 12% 2	2730
July	1st to 10th	Day	44% 15% 33% 7% 1	7615
	11th to 20th	Day	39% 14% 34% 12%	7611
	21st to end	Day	37% 14% 29% 19%	8156
August	1st to 10th	Day	46% 15% 29% 8% 1	4351
	11th to 20th	Day	35% 14% 29% 15% 6%	4089
	21st to end	Day	48% 16% 27% 8% 2	4048
September	1st to 10th	Day	53% 15% 21% 11% 1	2200
	11th to 20th	Day	54% 12% 19% 13% 2	2200
	21st to end	Day	50% 12% 17% 12% 8% 1	2200
October	1st to 10th	Day	53% 10% 16% 12% 6% 3	3496
	11th to 20th	Day	32% 6% 11% 23% 23% 4	3240
	21st to end	Day	31% 6% 10% 23% 24% 6%	3538
November	1st to 10th	Day	34% 6% 13% 20% 18% 9%	2057
	11th to 20th	Day	39% 5% 10% 21% 16% 8%	2100
	21st to end	Day	36% 6% 10% 23% 18% 7%	2100
December	1st to 10th	Day	27% 5% 17% 28% 15% 9%	3020
	11th to 20th	Day	39% 7% 11% 19% 16% 7%	3460
	21st to end	Day	43% 7% 14% 19% 14% 4	4565
January	1st to 10th	Night	26% 4 11% 30% 21% 8%	7636
	11th to 20th	Night	49% 4 11% 19% 11% 6%	7680
	21st to end	Night	36% 4 11% 26% 15% 8%	8244
February	1st to 10th	Night	34% 7% 11% 19% 20% 10%	2520
	11th to 20th	Night	30% 5% 11% 24% 22% 8%	2441
	21st to end	Night	25% 5% 13% 22% 27% 8%	1903
March	1st to 10th	Night	34% 5% 13% 22% 19% 7%	5028
	11th to 20th	Night	22% 5% 17% 25% 17% 14%	5090
	21st to end	Night	30% 6% 12% 27% 21% 4	5588
April	1st to 10th	Night	25% 4 20% 29% 16% 6%	2310
	11th to 20th	Night	25% 7% 16% 23% 22% 6%	2214
	21st to end	Night	26% 6% 14% 26% 22% 5%	2100
May	1st to 10th	Night	26% 8% 23% 30% 11% 3	5831
	11th to 20th	Night	33% 7% 23% 27% 9%	5235
	21st to end	Night	32% 10% 25% 25% 8%	5771
June	1st to 10th	Night	47% 8% 24% 17% 5%	1890
	11th to 20th	Night	42% 11% 25% 19% 2	1890
	21st to end	Night	41% 14% 25% 17% 3	1890
July	1st to 10th	Night	43% 15% 29% 12% 1	5235
	11th to 20th	Night	36% 15% 37% 12%	5226
	21st to end	Night	35% 12% 31% 21% 1	5606
August	1st to 10th	Night	39% 15% 33% 11% 2	2994
	11th to 20th	Night	34% 14% 30% 14% 8%	3203
	21st to end	Night	41% 16% 34% 9% 1	4049
September	1st to 10th	Night	45% 17% 24% 12% 1	2200
	11th to 20th	Night	46% 14% 22% 16% 2	2200
	21st to end	Night	45% 11% 20% 16% 8% 1	2200
October	1st to 10th	Night	53% 11% 14% 12% 8% 2	3684
	11th to 20th	Night	32% 6% 12% 24% 22% 3	3899
	21st to end	Night	32% 5% 10% 25% 21% 6%	4252
November	1st to 10th	Night	32% 6% 12% 22% 20% 8%	2461
	11th to 20th	Night	31% 6% 12% 26% 17% 7%	2520
	21st to end	Night	34% 5% 11% 23% 21% 6%	2520
December	1st to 10th	Night	24% 5% 17% 31% 12% 10%	4375
	11th to 20th	Night	40% 6% 13% 18% 15% 8%	4954
	21st to end	Night	44% 7% 15% 18% 11% 5%	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	7% 6% 37% 28% 19% 3	330
	11th to 20th	Day	12% 9% 33% 30% 11% 6%	330
	21st to end	Day	15% 7% 42% 26% 8% 1	363
February	1st to 10th	Day	9% 9% 23% 35% 18% 5%	330
	11th to 20th	Day	8% 3 30% 35% 18% 5%	346
	21st to end	Day	8% 6% 22% 36% 24% 4	446
March	1st to 10th	Day	6% 5% 31% 36% 21% 2	540
	11th to 20th	Day	9% 4 27% 30% 25% 5%	540
	21st to end	Day	6% 3 24% 33% 26% 7%	594
April	1st to 10th	Day	7% 5% 26% 34% 21% 7%	540
	11th to 20th	Day	6% 4 22% 34% 24% 10%	532
	21st to end	Day	5% 2 15% 34% 29% 14%	540
May	1st to 10th	Day	5% 1 17% 27% 32% 17%	543
	11th to 20th	Day	10% 2 14% 28% 30% 17%	567
	21st to end	Day	8% 1 5% 23% 31% 33%	617
June	1st to 10th	Day	16% 2 6% 18% 31% 28%	570
	11th to 20th	Day	8% 1 4 16% 29% 42%	570
	21st to end	Day	7% 3 1 12% 23% 53%	570
July	1st to 10th	Day	8% 1 1 8% 23% 58%	565
	11th to 20th	Day	4 1 1 10% 30% 54%	564
	21st to end	Day	8% 2 3 14% 21% 52%	620
August	1st to 10th	Day	7% 1 2 12% 25% 52%	566
	11th to 20th	Day	3 1 1 8% 29% 58%	559
	21st to end	Day	8% 3 3 15% 29% 42%	619
September	1st to 10th	Day	9% 2 4 12% 27% 46%	530
	11th to 20th	Day	11% 2 3 16% 30% 38%	530
	21st to end	Day	9% 2 5% 19% 31% 35%	530
October	1st to 10th	Day	15% 2 7% 29% 35% 13%	530
	11th to 20th	Day	6% 2 15% 32% 33% 12%	530
	21st to end	Day	8% 2 15% 33% 31% 10%	583
November	1st to 10th	Day	10% 4 17% 30% 29% 10%	535
	11th to 20th	Day	12% 3 17% 37% 25% 6%	540
	21st to end	Day	9% 3 19% 36% 26% 7%	540
December	1st to 10th	Day	5% 6% 31% 32% 17% 8%	330
	11th to 20th	Day	9% 6% 27% 35% 18% 5%	330
	21st to end	Day	8% 5% 25% 36% 19% 6%	363
January	1st to 10th	Night	10% 5% 27% 38% 19% 1	840
	11th to 20th	Night	12% 5% 29% 38% 15% 1	840
	21st to end	Night	15% 6% 29% 40% 11%	924
February	1st to 10th	Night	13% 5% 25% 41% 16%	840
	11th to 20th	Night	11% 4 27% 42% 15% 1	823
	21st to end	Night	8% 4 26% 48% 14% 1	692
March	1st to 10th	Night	7% 3 31% 44% 14%	840
	11th to 20th	Night	8% 4 26% 42% 19% 1	840
	21st to end	Night	6% 3 26% 47% 17%	924
April	1st to 10th	Night	5% 3 27% 47% 17% 1	840
	11th to 20th	Night	7% 3 23% 46% 20% 1	831
	21st to end	Night	6% 3 21% 47% 21% 1	840
May	1st to 10th	Night	6% 1 18% 48% 23% 3	834
	11th to 20th	Night	9% 1 9% 42% 35% 4	621
	21st to end	Night	8% 1 4 31% 48% 8%	683
June	1st to 10th	Night	13% 1 3 27% 47% 9%	630
	11th to 20th	Night	8% 2 2 17% 48% 23%	630
	21st to end	Night	8% 1 11% 50% 31%	630
July	1st to 10th	Night	11% 2 1 6% 48% 32%	615
	11th to 20th	Night	7% 1 8% 49% 36%	612
	21st to end	Night	5% 1 9% 49% 35%	690
August	1st to 10th	Night	6% 1 2 9% 49% 32%	627
	11th to 20th	Night	7% 1 9% 49% 34%	736
	21st to end	Night	11% 1 4 15% 45% 25%	917
September	1st to 10th	Night	10% 3 2 14% 46% 25%	800
	11th to 20th	Night	11% 2 3 20% 46% 18%	800
	21st to end	Night	14% 2 4 22% 43% 15%	800
October	1st to 10th	Night	16% 2 7% 35% 34% 6%	800
	11th to 20th	Night	9% 2 9% 34% 42% 4	800
	21st to end	Night	12% 3 13% 39% 30% 4	880
November	1st to 10th	Night	10% 3 17% 39% 29% 3	820
	11th to 20th	Night	8% 2 17% 45% 24% 3	840
	21st to end	Night	9% 2 20% 45% 24% 1	840
December	1st to 10th	Night	8% 3 20% 42% 25% 3	840
	11th to 20th	Night	10% 4 18% 43% 23% 3	840
	21st to end	Night	9% 3 21% 40% 25% 2	924

Page generated at 2026-08-27 04:07:14. Version ac07

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