Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 4

Waning Gibbous 95%

19:26

09:32

23 Bad
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

Sun - Rise: 07:42, Set: 16:35, Transit: 12:08. Moon - Rise: 19:26, Set: 09:32. Civil Dark: 17:08 - 07:08. Nautical Dark: 17:45 - 06:31. Astro Dark: 18:21 - 05:55

Total Clouds (% Sky Obscured)

46
38
31
33
93
85
87
100
100
100
100
100
100
100
100
100
100
97
94
97
89
88
88
89

Low Clouds (% Sky Obscured)

1
1
1
1
5
3
4
6
9
10
15
86
95
94
87
92
92
87
82
93
85
80
81
81

Medium Clouds (% Sky Obscured)

0
2
18
19
79
81
84
100
100
100
100
100
100
99
100
100
100
85
71
23
19
17
15
11

High Clouds (% Sky Obscured)

3
22
14
14
91
74
73
94
65
100
100
100
100
79
97
100
63
55
0
0
0
25
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
5
0
0
0
0
0
0
0
0
0
1
2
2
2

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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
5
25
53
71
77
72
61
73
72
56
28
14
15
15
14

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.2
0.4
0.4
0.4
0.2
0.4
0.4
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-17
-18
-20
-20
-20
-19
-18
-18
-17
-17
-16
-15
-14
-14
-13
-13
-12
-12
-13
-13
-13
-14
-15
-14

Feels Like (°C)

-20
-21
-23
-23
-22
-22
-22
-21
-21
-21
-20
-19
-19
-18
-18
-18
-17
-17
-17
-17
-17
-18
-19
-18

Dew Point (°C)

-20
-21
-22
-23
-22
-21
-21
-20
-20
-19
-18
-17
-16
-16
-15
-14
-14
-14
-14
-14
-15
-16
-17
-16

Relative Humidity (%)

80
80
80
79
79
80
81
81
80
82
81
82
84
84
86
86
86
88
88
88
88
86
86
86

Pressure (mb)

1023
1024
1024
1024
1024
1024
1024
1024
1023
1023
1023
1022
1022
1021
1020
1019
1018
1018
1018
1018
1018
1018
1018
1018

Ozone (du)

340
337
332
338
335
331
328
326
326
328
332
335
337
337
337
340
343
342
340
349
355
358
356
353

Monday 5

Waning Gibbous 89%

20:42

09:55

23 Bad
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

Sun - Rise: 07:41, Set: 16:36, Transit: 12:09. Moon - Rise: 20:42, Set: 09:55. Civil Dark: 17:09 - 07:08. Nautical Dark: 17:46 - 06:31. Astro Dark: 18:22 - 05:55

Total Clouds (% Sky Obscured)

91
87
92
92
94
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

82
82
92
92
91
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
92
89
92
93

Medium Clouds (% Sky Obscured)

12
4
2
0
0
0
0
1
8
1
52
17
52
95
98
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

0
14
3
0
5
30
91
72
90
86
77
71
75
100
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

2
2
2
2
2
1
1
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0

Fog (%)

0
0
0
0
0
0
0
0
1
1
2
6
9
9
8
9
9
10
10
4
1
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

18
11
5
3
7
14
10
10
16
14
18
13
19
13
12
22
28
56
85
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.6
0.6
0.6
0.8
1.2
1.1

Wind Speed/Direction (mph)

4
4
4
3
3
3
3
3
3
4
5
5
6
6
6
7
7
7
8
8
9
9
10
9

Chance of Frost

Temperature (°C)

-15
-15
-15
-15
-15
-15
-15
-14
-14
-14
-12
-11
-10
-9
-8
-8
-7
-7
-7
-7
-7
-6
-6
-6

Feels Like (°C)

-19
-19
-19
-19
-18
-19
-19
-18
-18
-18
-17
-15
-15
-14
-13
-13
-12
-12
-12
-12
-12
-12
-12
-11

Dew Point (°C)

-16
-17
-17
-17
-17
-17
-17
-16
-16
-15
-14
-13
-12
-10
-10
-9
-8
-8
-8
-8
-8
-7
-7
-6

Relative Humidity (%)

86
86
84
84
86
84
86
86
86
86
86
86
87
88
88
90
90
92
92
94
92
92
92
94

Pressure (mb)

1018
1017
1017
1018
1018
1017
1017
1017
1017
1017
1017
1016
1016
1014
1013
1012
1011
1010
1009
1009
1008
1007
1006
1005

Ozone (du)

351
350
349
348
348
347
347
349
351
351
350
349
350
353
355
354
353
353
355
358
361
364
364
367

Tuesday 6

Waning Gibbous 81%

21:54

10:15

23 Bad
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

Sun - Rise: 07:41, Set: 16:37, Transit: 12:09. Moon - Rise: 21:54, Set: 10:15. Civil Dark: 17:10 - 07:08. Nautical Dark: 17:47 - 06:31. Astro Dark: 18:23 - 05:55

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
97
100
100
100
100
100
99
75
93
97
98
100
100
100
100
100

Low Clouds (% Sky Obscured)

91
89
89
90
87
82
90
96
95
91
90
99
98
88
90
75
93
96
86
98
99
99
100
100

Medium Clouds (% Sky Obscured)

100
100
100
100
100
95
96
91
83
76
69
35
25
30
17
1
1
0
64
44
48
51
58
75

High Clouds (% Sky Obscured)

81
100
100
100
100
100
100
57
20
6
5
34
55
56
57
3
6
0
19
50
69
67
70
56

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
0
2
9
9
9
9
9
9
9
9
9
9
9
9
8
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

Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
94
68
35
27
13
10
6
9
3
2
1
4
0
0
0
0
1
2
4
4

Precipitation Amount (mm)

0.8
0.8
0.7
0.8
0.8
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
9
7
6
5
4
3
4
4
4
4
5
6
6
5
6
6
6
4
3
2
3
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-6
-5
-5
-5
-4
-4
-4
-4
-5
-5
-4
-4
-3
-4
-3
-2
-2
-3
-2
-3
-2
-2
-2
-2

Relative Humidity (%)

94
96
96
96
96
98
96
96
94
94
92
91
89
87
92
92
91
87
91
94
96
96
96
98

Pressure (mb)

1005
1004
1004
1004
1004
1004
1004
1005
1006
1007
1008
1009
1009
1009
1009
1010
1011
1012
1012
1013
1014
1014
1014
1015

Ozone (du)

367
369
362
359
360
363
362
368
367
365
370
375
369
365
365
372
367
361
363
359
358
358
356
355

Wednesday 7

Waning Gibbous 72%

23:03

10:32

23 Bad
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

Sun - Rise: 07:41, Set: 16:38, Transit: 12:09. Moon - Rise: 23:03, Set: 10:32. Civil Dark: 17:11 - 07:07. Nautical Dark: 17:48 - 06:30. Astro Dark: 18:24 - 05:55

Total Clouds (% Sky Obscured)

100
100
100
100
95
96
100
100
99
62
63
59
85
85
99
97
97
97
97
97
98
99
100
100

Low Clouds (% Sky Obscured)

100
100
100
100
93
95
100
100
99
62
58
58
82
81
98
96
94
94
95
95
89
78
80
68

Medium Clouds (% Sky Obscured)

64
53
33
28
24
15
8
2
2
0
0
0
0
0
2
3
3
5
1
1
18
67
88
78

High Clouds (% Sky Obscured)

41
18
11
5
4
3
4
8
1
0
0
8
17
24
16
8
1
11
26
35
57
79
85
100

ISS Passover

Visibility (miles)

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

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 (%)

8
21
8
7
3
3
2
1
2
3
3
3
2
0
0
0
1
0
0
1
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)

2
3
2
3
3
3
3
3
2
2
2
2
2
2
2
3
4
4
4
5
4
4
3
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-2
-2
-1
-1
-1
-2
-3
-2
-2
-2
-3
-1
0
0
0
-0
-1
-1
-1
-1
-1
-0
-1
-1

Relative Humidity (%)

96
98
100
98
98
96
98
96
96
96
96
98
100
100
100
100
98
94
94
92
94
98
98
100

Pressure (mb)

1015
1015
1016
1016
1016
1017
1017
1018
1018
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1020
1020
1020

Ozone (du)

355
356
356
355
351
343
334
329
324
322
323
325
326
324
323
323
327
330
330
341
343
340
341
343

Thursday 8

Waning Gibbous 62%

23:03

10:49

23 Bad
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

Sun - Rise: 07:40, Set: 16:39, Transit: 12:10. Moon - Rise: 23:03, Set: 10:49. Civil Dark: 17:12 - 07:07. Nautical Dark: 17:49 - 06:30. Astro Dark: 18:25 - 05:55

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
95
91
86
91

Low Clouds (% Sky Obscured)

57
32
15
11
9
38
66
95
97
98
100
100
100
100
100
100
100
100
100
100
90
80
70
76

Medium Clouds (% Sky Obscured)

74
57
52
48
42
58
100
100
95
100
100
99
99
98
99
100
100
98
95
92
78
62
47
42

High Clouds (% Sky Obscured)

100
100
80
60
35
20
20
20
19
30
30
32
45
55
25
25
5
10
20
40
55
65
65
91

ISS Passover

Visibility (miles)

0
0
0
1
2
1
2
9
9
5
3
1
0
0
0
0
0
0
0
0
0
0
0
0

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
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
Very Light Rain
Light Rain
Light Rain
Very Light Rain

Precipitation Probability (%)

0
0
1
2
3
30
60
77
95
95
95
95
95
95
89
87
83
74
67
60
68
75
79
64

Precipitation Amount (mm)

0
0
0
0
0
0
0.3
0.4
0.8
1.2
2.1
1.5
1
0.8
0.6
0.5
0.5
0.4
0.3
0
0.3
0.4
0.5
0.3

Wind Speed/Direction (mph)

4
5
5
5
5
5
6
6
5
5
4
5
5
5
5
5
5
4
4
4
4
4
4
4

Chance of Frost

Temperature (°C)

-1
-1
-2
-2
-3
-3
-2
-1
-1
0
1
1
2
2
2
3
3
3
3
2
2
2
2
1

Feels Like (°C)

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

Dew Point (°C)

-1
-1
-2
-2
-3
-3
-2
-2
-1
-1
1
1
2
2
2
3
3
3
3
2
2
2
2
1

Relative Humidity (%)

100
100
98
98
98
98
98
96
98
96
98
98
100
100
100
100
100
98
100
100
100
100
100
100

Pressure (mb)

1019
1019
1018
1017
1017
1016
1015
1013
1012
1012
1012
1011
1011
1011
1011
1009
1009
1009
1010
1010
1011
1011
1012
1012

Ozone (du)

343
338
333
327
322
315
310
307
306
300
299
294
292
294
292
291
290
289
288
286
285
285
285
284

Friday 9

Waning Gibbous 52%

00:10

11:06

23 Bad
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

Sun - Rise: 07:40, Set: 16:40, Transit: 12:10. Moon - Rise: 00:10, Set: 11:06. Civil Dark: 17:13 - 07:07. Nautical Dark: 17:50 - 06:30. Astro Dark: 18:26 - 05:54

Total Clouds (% Sky Obscured)

95
100
98
97
96
93
90
88
93
97
100
100
100
100
100
100
100
100
100
100
99
98
97
97

Low Clouds (% Sky Obscured)

82
89
88
87
86
78
69
61
72
84
96
97
99
100
97
95
92
93
97
100
98
96
94
93

Medium Clouds (% Sky Obscured)

34
26
24
24
23
37
54
73
82
92
100
90
82
75
68
60
55
80
89
89
79
61
39
21

High Clouds (% Sky Obscured)

95
100
86
69
53
42
27
15
15
15
10
3
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

2
4
5
4
2
0
0
0
0
0
0
0
0
0
0
0
0
0
3
6
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Sleet
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None

Precipitation Probability (%)

47
24
22
20
21
36
54
73
95
95
95
95
95
95
92
85
93
95
95
95
95
86
15
16

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.3
0.9
1.2
1.6
1.2
1.1
0.7
0.6
0.5
0.6
0.9
1
1
0.9
0.6
0
0

Wind Speed/Direction (mph)

3
3
3
3
3
4
5
6
7
7
6
6
6
6
6
5
7
8
9
10
11
9
9
11

Chance of Frost

Temperature (°C)

1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

100
98
100
100
98
100
100
98
100
100
100
100
100
100
100
100
100
100
96
93
88
86
86
86

Pressure (mb)

1012
1013
1013
1012
1012
1012
1011
1011
1010
1009
1008
1007
1006
1005
1004
1003
1002
1002
1001
1001
1001
1001
1001
1001

Ozone (du)

285
286
286
287
287
288
288
289
289
290
290
291
294
297
299
302
305
308
313
319
324
333
341
349

Saturday 10

Third Quarter 42%

01:16

11:24

23 Bad
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

Sun - Rise: 07:40, Set: 16:41, Transit: 12:11. Moon - Rise: 01:16, Set: 11:24. Civil Dark: 17:15 - 07:06. Nautical Dark: 17:51 - 06:30. Astro Dark: 18:27 - 05:54

Total Clouds (% Sky Obscured)

97
96
96
94
93
95
93
96
90
83
77
82
87
91
93
95
97
98
99
100

Low Clouds (% Sky Obscured)

93
93
94
94
93
95
93
93
83
74
67
72
77
82
86
91
95
97
98
99

Medium Clouds (% Sky Obscured)

10
0
19
32
48
43
44
48
39
23
12
19
23
24
18
21
27
25
19
13

High Clouds (% Sky Obscured)

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

ISS Passover

Visibility (miles)

7
4
1
1
1
1
4
7
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

Precipitation Type

None
None
None
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

16
18
31
39
45
38
28
8
19
21
19
30
32
32
27
21
17
16
15
14

Precipitation Amount (mm)

0
0
0
0.1
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
11
9
9
11
11
12
12
12
12
13
13
13
14
13
13
13
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-3
-4
-5
-4
-5
-4
-4
-5
-10
-12
-12
-13
-13
-13
-12
-12
-12
-12
-12

Dew Point (°C)

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

Relative Humidity (%)

88
91
91
91
91
89
87
82
79
79
79
79
77
79
77
77
79
80
82
83

Pressure (mb)

1001
1001
1001
1001
1001
1002
1003
1003
1004
1005
1006
1007
1007
1008
1008
1009
1010
1011
1013
1014

Ozone (du)

356
362
368
375
382
389
390
390
391
394
398
401
407
412
418
425
433
441
433
425

Forecast for ByWard Market, Ottawa, Canada (45.42,-75.69)

Generated: 04/01/26 23:13:32. Forecast: 04/01/26 to 10/01/26. Timezone: UTC-5.00