Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 7

Waning Gibbous 91%

19:39

10:12

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 OK
08 OK
09 OK
10 OK
11 OK
12 OK
13 Bad
14 Bad
15 Bad
16 Bad
17 OK
18 Bad
19 OK
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:10, Set: 16:35, Transit: 11:53. Moon - Rise: 19:39, Set: 10:12. Civil Dark: 17:05 - 06:40. Nautical Dark: 17:39 - 06:06. Astro Dark: 18:12 - 05:33

Total Clouds (% Sky Obscured)

71
66
68
70
73
73
50
39
31
25
35
35
27
55
70
61
73
46
49
20
61
71
86
87

Low Clouds (% Sky Obscured)

43
48
49
47
48
48
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

5
4
6
5
12
15
0
0
0
0
3
17
16
5
61
61
51
4
3
0
3
3
0
3

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
2
35
35
26
35
35
27
27
19
24
10
52
67
79
84

ISS Passover

Visibility (miles)

-
-
-
-
-
-
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

-
-
-
-
-
-
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
3
4
2
1
0
0
0
0
0
2
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

19
19
20
19
19
18
6
3
0
0
8
10
10
9
7
5
3
3
3
3
2
3
3
4

Chance of Frost

Temperature (°C)

-6
-6
-7
-7
-8
-8
0
0
2
3
4
4
5
6
6
5
4
2
1
0
-1
-1
-1
-1

Feels Like (°C)

-13
-14
-14
-14
-15
-15
-4
-4
-4
-4
-2
-3
-2
-1
0
0
-1
-3
-4
-4
-4
-6
-6
-5

Dew Point (°C)

-10
-10
-11
-11
-11
-12
-9
-8
-8
-8
-8
-8
-8
-8
-8
-7
-7
-8
-9
-9
-10
-11
-11
-10

Relative Humidity (%)

75
74
73
75
73
72
51
52
48
46
43
41
39
36
37
40
46
49
49
50
50
48
49
50

Pressure (mb)

1020
1020
1021
1021
1022
1023
1020
1021
1021
1021
1022
1021
1020
1019
1019
1019
1019
1021
1021
1021
1020
1020
1020
1019

Ozone (du)

300
301
303
305
303
300
304
304
302
302
301
297
294
294
292
289
285
284
283
283
284
283
284
284

Monday 8

Waning Gibbous 84%

20:54

10:51

00 Bad
01 Bad
02 Bad
03 Bad
04 OK
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:11, Set: 16:35, Transit: 11:53. Moon - Rise: 20:54, Set: 10:51. Civil Dark: 17:06 - 06:41. Nautical Dark: 17:39 - 06:07. Astro Dark: 18:12 - 05:34

Total Clouds (% Sky Obscured)

100
94
88
85
26
2
0
0
0
0
0
0
0
63
70
70
70
73
100
80
57
76
78
79

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

28
3
0
24
0
0
0
0
0
0
0
0
0
0
0
0
0
1
42
2
2
54
2
2

High Clouds (% Sky Obscured)

100
94
88
34
22
1
0
0
0
0
0
0
0
29
40
45
40
46
100
80
57
58
78
79

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
1
1
0
0
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

2
5
5
6
6
6
6
5
5
5
3
4
4
2
1
2
1
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
6
7
8
8
8
7
7
4
4
7
9
10
10
10
9
8
6
4
5
5
6
7
8

Chance of Frost

Temperature (°C)

-0
1
2
-0
0
0
1
2
2
6
8
9
9
9
8
8
7
5
3
3
3
4
3
2

Feels Like (°C)

-5
-4
-3
-5
-5
-4
-3
-3
-1
3
3
4
4
5
2
1
1
-1
-2
-3
-1
-1
-1
-1

Dew Point (°C)

-9
-8
-7
-8
-8
-7
-7
-7
-6
-5
-5
-5
-5
-5
-4
-4
-5
-5
-7
-7
-7
-7
-7
-8

Relative Humidity (%)

51
52
54
54
55
57
56
52
53
45
40
38
36
36
41
43
45
49
50
48
48
46
47
46

Pressure (mb)

1018
1018
1017
1018
1018
1018
1019
1019
1019
1019
1019
1018
1017
1017
1017
1017
1017
1017
1018
1018
1018
1017
1016
1016

Ozone (du)

287
289
287
287
287
289
290
292
292
298
307
311
312
307
307
310
308
306
307
305
302
299
297
296

Tuesday 9

Waning Gibbous 74%

22:05

11:22

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:12, Set: 16:35, Transit: 11:54. Moon - Rise: 22:05, Set: 11:22. Civil Dark: 17:06 - 06:41. Nautical Dark: 17:40 - 06:07. Astro Dark: 18:12 - 05:35

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
95
96
97

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5

Medium Clouds (% Sky Obscured)

78
47
2
0
0
0
0
8
15
3
0
0
0
0
0
0
0
0
0
0
0
0
1
3

High Clouds (% Sky Obscured)

92
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
94
95
95

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
1
1
2
1
1
2
4
4
4
3
5
9
9
10
13
20
21

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
8
7
8
8
8
7
8
8
9
10
9
5
4
3
4
5
4
5
2
1
1
4
0

Chance of Frost

Temperature (°C)

1
2
2
2
2
2
2
2
4
6
9
11
11
13
12
11
9
7
6
6
7
6
6
6

Feels Like (°C)

-2
-3
-3
-3
-3
-3
-3
-3
-1
2
5
7
9
10
10
8
6
4
4
3
4
3
1
3

Dew Point (°C)

-9
-9
-9
-9
-9
-9
-9
-9
-9
-6
-5
-4
-3
-3
-1
-1
-2
-3
-3
-2
-3
-3
-3
-2

Relative Humidity (%)

47
44
43
44
44
45
44
43
41
40
37
34
37
33
39
43
46
51
51
59
51
54
53
57

Pressure (mb)

1015
1014
1013
1012
1011
1011
1010
1010
1009
1008
1008
1007
1006
1005
1005
1005
1005
1005
1006
1006
1007
1008
1008
1009

Ozone (du)

299
306
311
310
309
315
319
317
317
319
319
316
311
308
301
300
300
300
297
293
292
291
287
287

Wednesday 10

Waning Gibbous 64%

23:12

11:47

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:12, Set: 16:35, Transit: 11:54. Moon - Rise: 23:12, Set: 11:47. Civil Dark: 17:06 - 06:42. Nautical Dark: 17:40 - 06:08. Astro Dark: 18:13 - 05:35

Total Clouds (% Sky Obscured)

93
94
98
99
100
97
93
91
92
94
100
100
99
96
100
97
100
96
94
91
91
91
90
85

Low Clouds (% Sky Obscured)

11
17
13
5
2
7
31
31
30
2
0
0
0
0
0
0
0
0
0
0
0
0
0
4

Medium Clouds (% Sky Obscured)

6
8
6
3
2
2
2
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
4

High Clouds (% Sky Obscured)

93
92
96
98
100
97
82
79
86
94
100
100
99
96
100
96
100
96
94
91
91
91
90
81

ISS Passover

Visibility (miles)

9
9
9
9
9
9
0
0
0
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

25
21
36
31
19
31
40
45
49
45
33
37
35
26
36
35
27
31
28
22
29
29
23
32

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

0
0
0
1
3
4
5
6
7
8
8
9
11
11
12
12
12
12
10
11
13
13
14
16

Chance of Frost

Temperature (°C)

5
4
3
3
2
1
-1
1
2
3
8
11
12
11
12
11
8
7
6
7
7
7
8
9

Feels Like (°C)

2
2
1
-1
-3
-3
-4
-3
-3
-0
6
9
9
9
9
8
5
4
4
4
3
3
4
3

Dew Point (°C)

-2
-2
-2
-2
-1
-1
-1
0
1
0
0
1
1
1
1
1
-1
-2
-1
-1
-1
-1
-0
-1

Relative Humidity (%)

60
66
68
72
83
92
96
96
93
80
60
47
46
48
45
51
53
55
59
55
59
58
57
53

Pressure (mb)

1009
1010
1011
1011
1010
1011
1011
1011
1010
1009
1006
1004
1003
1002
1001
1000
1001
1001
1001
1001
1001
1000
1000
1000

Ozone (du)

285
282
279
281
281
283
280
282
284
284
285
284
283
282
281
280
280
279
278
279
279
278
280
279

Thursday 11

Third Quarter 54%

No Rise

12:09

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Good
23 OK

Sun - Rise: 07:13, Set: 16:36, Transit: 11:54. Moon - Rise: No Rise, Set: 12:09. Civil Dark: 17:06 - 06:43. Nautical Dark: 17:40 - 06:09. Astro Dark: 18:13 - 05:36

Total Clouds (% Sky Obscured)

45
71
82
86
100
100
100
100
100
100
86
41
25
80
90
99
100
100
99
99
70
39
9
35

Low Clouds (% Sky Obscured)

8
12
25
41
53
61
94
95
95
95
86
41
25
53
61
66
70
69
69
68
46
25
1
1

Medium Clouds (% Sky Obscured)

8
13
36
67
90
90
75
57
62
67
57
41
25
58
61
64
51
47
30
19
9
4
0
0

High Clouds (% Sky Obscured)

39
52
68
78
100
100
100
51
97
51
40
30
16
56
61
68
67
67
57
51
38
13
5
32

ISS Passover

Visibility (miles)

9
9
9
9
9
9
0
0
0
0
0
2
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
Light Rain
Snow
Snow
Snow
Snow
Snow
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
Snow
Snow
None
None
None
None
None

Precipitation Probability (%)

35
34
41
45
51
78
95
95
95
95
95
95
95
95
91
68
43
61
47
29
28
23
9
14

Precipitation Amount (mm)

0
0
0
0
0
0.5
0.8
1.2
1.2
1.5
2.1
1.6
1.3
1.3
0.7
0.3
0
0.2
0.1
0
0
0
0
0

Wind Speed/Direction (mph)

18
11
6
2
5
9
9
8
8
7
6
5
4
4
4
3
4
3
2
2
2
0
0
1

Chance of Frost

Temperature (°C)

11
10
7
6
4
3
-1
-1
-1
-1
-0
1
3
5
6
5
1
-1
-1
-2
-2
-2
-2
-2

Feels Like (°C)

2
4
3
4
-0
-3
-7
-6
-6
-6
-6
-4
-1
3
2
1
-3
-5
-4
-4
-4
-4
-4
-4

Dew Point (°C)

0
0
-1
-1
-2
-0
-2
-2
-2
-2
-3
-3
-4
-4
-4
-3
-5
-6
-6
-6
-6
-6
-6
-6

Relative Humidity (%)

49
50
57
63
64
77
92
92
91
89
83
74
64
53
52
57
63
71
71
74
74
75
76
78

Pressure (mb)

1000
1002
1005
1006
1009
1013
1016
1018
1019
1020
1021
1021
1019
1016
1016
1017
1018
1019
1019
1020
1020
1020
1020
1020

Ozone (du)

279
280
280
279
281
282
285
287
290
289
288
288
289
288
287
286
285
284
283
282
281
281
280
280

Friday 12

Waning Crescent 43%

00:15

12:30

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:14, Set: 16:36, Transit: 11:55. Moon - Rise: 00:15, Set: 12:30. Civil Dark: 17:06 - 06:44. Nautical Dark: 17:40 - 06:10. Astro Dark: 18:13 - 05:37

Total Clouds (% Sky Obscured)

59
85
89
94
95
94
95
94
93
91
89
89
88
88
91
95
99
97
96
94
93
92
90
91

Low Clouds (% Sky Obscured)

1
1
3
7
9
39
68
94
87
87
52
69
74
82
82
86
85
84
79
78
76
82
84
84

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

59
85
88
87
81
71
64
60
68
61
55
60
61
74
87
91
96
95
90
72
46
27
6
17

ISS Passover

Visibility (miles)

9
9
9
6
3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

18
6
10
11
4
11
13
13
16
18
18
18
16
13
12
10
3
6
7
3
10
13
14
16

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

1
0
1
1
1
2
2
3
3
3
3
3
2
1
1
0
0
0
2
4
6
5
3
2

Chance of Frost

Temperature (°C)

-4
-4
-4
-4
-5
-6
-7
-7
-6
-4
-4
-2
-1
-1
-1
-2
-2
-3
-3
-4
-5
-6
-7
-7

Feels Like (°C)

-6
-5
-5
-5
-4
-4
-10
-11
-11
-9
-8
-6
-6
-6
-7
-7
-6
-7
-7
-7
-7
-9
-9
-9

Dew Point (°C)

-7
-7
-7
-7
-7
-7
-8
-8
-8
-6
-6
-4
-4
-4
-4
-4
-4
-5
-4
-5
-6
-8
-8
-9

Relative Humidity (%)

78
79
78
82
85
90
89
89
89
87
86
84
83
81
81
84
87
89
91
91
90
89
89
87

Pressure (mb)

1020
1021
1021
1023
1024
1026
1027
1028
1028
1028
1028
1028
1027
1025
1024
1024
1024
1024
1024
1024
1024
1024
1025
1025

Ozone (du)

279
279
279
280
282
283
285
286
287
287
287
286
285
283
281
282
282
282
280
277
275
275
276
276

Saturday 13

Waning Crescent 34%

01:17

12:50

Sun - Rise: 07:15, Set: 16:36, Transit: 11:55. Moon - Rise: 01:17, Set: 12:50. Civil Dark: 17:06 - 06:44. Nautical Dark: 17:40 - 06:10. Astro Dark: 18:13 - 05:37

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Boulder, Boulder, United States of America (40.01,-105.27)

Generated: 07/12/25 06:41:06. Forecast: 07/12/25 to 13/12/25. Timezone: UTC-7.00