Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 10%

03:17

18:11

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

Sun - Rise: 06:54, Set: 19:14, Transit: 13:04. Moon - Rise: 03:17, Set: 18:11. Civil Dark: 19:43 - 06:25. Nautical Dark: 20:18 - 05:50. Astro Dark: 20:54 - 05:14

Total Clouds (% Sky Obscured)

28
60
100
74
78
59
57
58
72
79
66
72
41
40
61
64
53
41
2
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
32
59
59
56
57
57
49
45
38
28
13
3
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
20
28
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

28
60
88
74
76
51
51
55
53
36
28
34
26
37
61
64
53
41
2
0
0
0
0
0

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
2
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
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

14
13
12
14
13
14
14
13
14
15
16
18
19
21
22
23
23
22
22
20
18
17
16
15

Feels Like (°C)

14
13
11
13
13
14
14
13
14
15
15
16
17
20
22
23
22
21
21
20
19
18
17
16

Dew Point (°C)

9
8
8
9
8
9
9
9
10
10
9
9
9
8
8
8
6
5
6
8
9
9
8
8

Relative Humidity (%)

71
71
72
71
72
72
74
77
76
69
64
55
49
43
39
36
34
33
35
45
52
58
61
63

Pressure (mb)

1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1017
1017
1016
1015
1014
1014
1013
1013
1013
1014
1014
1014
1014

Ozone (du)

275
274
273
273
274
275
275
276
277
276
277
276
276
277
277
278
279
280
282
283
283
283
283
284

Friday 19

Waning Crescent 4%

04:30

18:30

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

Sun - Rise: 06:55, Set: 19:12, Transit: 13:04. Moon - Rise: 04:30, Set: 18:30. Civil Dark: 19:41 - 06:26. Nautical Dark: 20:16 - 05:51. Astro Dark: 20:52 - 05:15

Total 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

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)

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)

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

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
0
0
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

14
13
13
13
12
11
11
10
11
14
17
19
20
22
24
24
25
25
25
21
19
18
17
15

Feels Like (°C)

15
15
14
14
13
12
12
12
13
15
18
19
21
22
24
24
25
25
25
22
19
19
19
17

Dew Point (°C)

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

Relative Humidity (%)

65
66
69
71
73
76
77
77
72
63
55
47
39
31
27
24
22
20
23
28
36
45
48
50

Pressure (mb)

1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1013
1012
1012
1012
1012
1012
1013
1014
1014
1015

Ozone (du)

284
284
284
282
281
280
280
280
281
279
277
276
275
274
274
274
273
273
272
271
271
270
269
269

Saturday 20

Waning Crescent 1%

05:40

18:47

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

Sun - Rise: 06:57, Set: 19:10, Transit: 13:03. Moon - Rise: 05:40, Set: 18:47. Civil Dark: 19:39 - 06:27. Nautical Dark: 20:14 - 05:52. Astro Dark: 20:50 - 05:17

Total Clouds (% Sky Obscured)

0
0
0
0
49
50
55
65
17
0
0
6
28
50
23
26
78
78
71
65
70
78
86
89

Low Clouds (% Sky Obscured)

0
0
0
0
28
31
31
37
10
0
0
0
6
11
10
18
36
40
26
21
27
78
84
89

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
55
70
78
86
89

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
6
15
25
5
2
22
27
26
20
20
2
1
30

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
3
3

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
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
15
73
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
1.9
0.9

Wind Speed/Direction (mph)

2
2
2
1
1
2
2
1
1
1
2
2
3
4
4
4
4
5
8
6
6
4
3
4

Chance of Frost

Temperature (°C)

14
13
12
12
11
10
10
9
10
14
17
20
22
23
24
25
25
25
23
20
18
17
16
15

Feels Like (°C)

15
15
14
14
13
12
11
11
12
14
18
21
22
22
22
25
25
23
20
18
16
15
15
15

Dew Point (°C)

5
5
4
4
3
3
3
3
4
5
7
8
8
8
7
7
7
9
10
9
8
8
11
14

Relative Humidity (%)

52
55
58
58
59
61
63
64
62
56
50
45
41
36
32
31
33
37
43
46
51
56
72
90

Pressure (mb)

1015
1015
1016
1016
1016
1016
1017
1017
1018
1018
1018
1018
1017
1017
1016
1016
1015
1015
1015
1016
1017
1017
1018
1018

Ozone (du)

269
269
269
269
269
268
267
267
267
266
267
267
267
266
266
265
265
265
265
265
266
266
266
267

Sunday 21

New Moon 0%

06:48

19:03

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 OK
17 OK
18 OK
19 OK
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 06:58, Set: 19:08, Transit: 13:03. Moon - Rise: 06:48, Set: 19:03. Civil Dark: 19:37 - 06:28. Nautical Dark: 20:12 - 05:54. Astro Dark: 20:48 - 05:18

Total Clouds (% Sky Obscured)

95
100
100
100
100
100
100
100
84
100
79
91
62
65
67
50
36
37
40
44
50
50
56
60

Low Clouds (% Sky Obscured)

94
99
99
100
100
100
100
100
75
43
51
41
35
35
28
20
17
19
20
25
28
28
31
36

Medium Clouds (% Sky Obscured)

95
92
25
25
25
31
27
26
30
30
29
21
18
18
12
11
10
7
5
0
0
0
0
0

High Clouds (% Sky Obscured)

51
76
50
25
0
1
0
0
1
20
1
18
1
0
0
0
0
0
0
0
0
1
1
0

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

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

Precipitation Probability (%)

72
66
69
54
59
50
47
49
43
32
21
12
9
4
4
3
1
3
5
3
7
7
6
7

Precipitation Amount (mm)

0.2
0.2
0.3
0
0.3
0.2
0.2
0.3
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

16
16
15
15
15
15
15
15
15
15
15
16
17
17
18
18
19
20
18
17
16
16
15
15

Feels Like (°C)

15
15
15
14
14
14
14
15
15
16
15
17
16
17
18
19
19
19
16
16
16
16
16
16

Dew Point (°C)

14
14
14
14
14
13
14
14
13
13
11
9
6
2
1
-1
-1
0
3
5
5
6
6
7

Relative Humidity (%)

92
92
92
92
93
92
92
92
90
86
78
62
47
37
31
28
26
26
36
44
49
53
55
58

Pressure (mb)

1018
1018
1018
1018
1018
1019
1019
1019
1020
1020
1021
1021
1021
1020
1020
1019
1019
1018
1019
1019
1019
1020
1020
1020

Ozone (du)

269
273
273
273
273
273
273
274
273
273
273
273
271
270
268
267
266
264
263
263
262
262
261
260

Monday 22

Waxing Crescent 1%

07:55

19:19

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

Sun - Rise: 06:59, Set: 19:06, Transit: 13:03. Moon - Rise: 07:55, Set: 19:19. Civil Dark: 19:35 - 06:30. Nautical Dark: 20:10 - 05:55. Astro Dark: 20:46 - 05:20

Total Clouds (% Sky Obscured)

63
65
59
58
53
54
55
55
50
48
49
36
33
30
21
12
4
3
1
0
0
0
0
0

Low Clouds (% Sky Obscured)

37
38
38
33
33
35
29
27
24
25
24
13
13
13
10
7
2
2
1
0
0
0
0
0

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)

1
1
0
0
0
0
1
1
1
1
9
4
4
6
4
2
1
0
0
0
0
0
0
0

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 (%)

8
8
8
6
5
5
4
1
1
1
0
1
1
0
0
0
0
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)

2
2
2
2
3
3
2
2
2
2
3
3
3
3
3
3
4
4
4
4
4
3
3
3

Chance of Frost

Temperature (°C)

15
15
15
14
14
14
14
14
14
15
17
19
20
21
23
23
23
24
22
20
18
17
16
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

62
66
68
71
74
76
78
79
76
66
55
46
36
30
24
21
19
17
21
25
31
33
35
38

Pressure (mb)

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

Ozone (du)

259
259
259
260
259
258
258
258
257
258
257
257
257
257
257
257
257
258
258
258
258
258
259
259

Tuesday 23

Waxing Crescent 4%

09:01

19:36

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

Sun - Rise: 07:00, Set: 19:04, Transit: 13:02. Moon - Rise: 09:01, Set: 19:36. Civil Dark: 19:34 - 06:31. Nautical Dark: 20:08 - 05:56. Astro Dark: 20:44 - 05:21

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
13
26
39
57
78
96
98
99
100
100

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)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
3
3
17
29
43
39
37
35
56

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
13
26
39
57
76
90
83
87
100
100

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

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)

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

Chance of Frost

Temperature (°C)

14
13
13
12
12
11
11
12
11
14
17
20
22
24
25
26
27
27
25
23
21
20
20
19

Feels Like (°C)

14
14
14
14
14
13
11
12
12
13
14
14
21
22
22
23
24
25
25
24
22
22
21
21

Dew Point (°C)

1
1
1
2
2
2
1
2
2
3
3
3
3
3
2
3
4
4
5
6
7
8
10
11

Relative Humidity (%)

41
43
45
47
49
51
50
51
51
45
39
34
29
25
22
22
22
22
27
32
39
44
52
60

Pressure (mb)

1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1013
1012
1011
1011
1010
1011
1011
1011
1012
1012
1012

Ozone (du)

260
260
261
262
262
262
264
265
267
267
267
268
268
267
267
267
267
266
266
266
265
266
266
267

Wednesday 24

Waxing Crescent 9%

10:07

19:55

Sun - Rise: 07:02, Set: 19:02, Transit: 13:02. Moon - Rise: 10:07, Set: 19:55. Civil Dark: 19:32 - 06:32. Nautical Dark: 20:06 - 05:58. Astro Dark: 20:41 - 05:22

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 West Portland, Multnomah, United States of America (45.46,-122.72)

Generated: 18/09/25 00:17:16. Forecast: 18/09/25 to 24/09/25. Timezone: UTC-7.00