Currently: 75 °F. Partly sunny. (Weather station: Ottawa Int'L. Ont., Canada). See more current weatherMay 2018 Weather in Ottawa — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
32
37
42
47
52
57
62
67
72
77
82
Tue, May 1
Lo:34
12 am
Hi:43
4
Lo:34
6 am
Hi:55
5
Lo:61
12 pm
Hi:66
11
Lo:57
6 pm
Hi:64
9
Wed, May 2
Lo:54
12 am
Hi:57
9
Lo:57
6 am
Hi:77
11
Lo:72
12 pm
Hi:79
17
Lo:54
6 pm
Hi:73
9
Thu, May 3
Lo:54
12 am
Hi:55
3
Lo:55
6 am
Hi:61
4
Lo:59
12 pm
Hi:63
8
Lo:54
6 pm
Hi:59
9
Fri, May 4
Lo:43
12 am
Hi:54
9
Lo:46
6 am
Hi:50
9
Lo:48
12 pm
Hi:63
10
Lo:45
6 pm
Hi:73
27
Sat, May 5
Lo:43
12 am
Hi:45
16
Lo:45
6 am
Hi:66
12
Lo:66
12 pm
Hi:73
14
Lo:55
6 pm
Hi:70
9
Sun, May 6
Lo:48
12 am
Hi:57
10
Lo:48
6 am
Hi:63
8
Lo:59
12 pm
Hi:66
12
Lo:52
6 pm
Hi:59
13
Mon, May 7
Lo:41
12 am
Hi:52
12
Lo:41
6 am
Hi:54
10
Lo:54
12 pm
Hi:59
7
Lo:46
6 pm
Hi:59
6
Tue, May 8
Lo:41
12 am
Hi:48
6
Lo:41
6 am
Hi:68
9
Lo:68
12 pm
Hi:73
11
Lo:57
6 pm
Hi:72
7
Wed, May 9
Lo:43
12 am
Hi:57
5
Lo:48
6 am
Hi:73
7
Lo:73
12 pm
Hi:81
9
Lo:64
6 pm
Hi:79
9
Thu, May 10
Lo:64
12 am
Hi:66
13
Lo:59
6 am
Hi:66
16
Lo:61
12 pm
Hi:68
21
Lo:46
6 pm
Hi:63
20
Fri, May 11
Lo:34
12 am
Hi:46
14
Lo:34
6 am
Hi:43
10
Lo:50
12 pm
Hi:54
12
Lo:41
6 pm
Hi:52
7
Sat, May 12
Lo:34
12 am
Hi:41
4
Lo:34
6 am
Hi:59
4
Lo:59
12 pm
Hi:64
6
Lo:41
6 pm
Hi:63
6
Sun, May 13
Lo:39
12 am
Hi:46
3
Lo:41
6 am
Hi:66
6
Lo:66
12 pm
Hi:72
9
Lo:55
6 pm
Hi:70
9
Mon, May 14
Lo:50
12 am
Hi:55
7
Lo:50
6 am
Hi:70
9
Lo:73
12 pm
Hi:77
16
Lo:61
6 pm
Hi:73
11
Tue, May 15
Lo:55
12 am
Hi:61
7
Lo:55
6 am
Hi:63
9
Lo:63
12 pm
Hi:68
14
Lo:52
6 pm
Hi:66
12
Wed, May 16
Lo:37
12 am
Hi:52
9
Lo:41
6 am
Hi:63
9
Lo:63
12 pm
Hi:73
14
Lo:61
6 pm
Hi:72
13
Thu, May 17
Lo:55
12 am
Hi:61
8
Lo:55
6 am
Hi:63
12
Lo:63
12 pm
Hi:64
12
Lo:50
6 pm
Hi:63
12
Fri, May 18
Lo:39
12 am
Hi:50
10
Lo:39
6 am
Hi:55
10
Lo:55
12 pm
Hi:63
8
Lo:46
6 pm
Hi:63
8
Sat, May 19
Lo:45
12 am
Hi:46
10
Lo:45
6 am
Hi:64
9
Lo:55
12 pm
Hi:64
8
Lo:55
6 pm
Hi:57
8
Sun, May 20
Lo:57
12 am
Hi:59
7
Lo:57
6 am
Hi:59
13
Lo:57
12 pm
Hi:64
12
Lo:48
6 pm
Hi:63
9
Mon, May 21
Lo:43
12 am
Hi:48
7
Lo:43
6 am
Hi:72
10
Lo:72
12 pm
Hi:79
12
Lo:57
6 pm
Hi:77
7
Tue, May 22
Lo:54
12 am
Hi:59
6
Lo:54
6 am
Hi:64
4
Lo:59
12 pm
Hi:63
4
Lo:52
6 pm
Hi:59
5
Wed, May 23
Lo:50
12 am
Hi:52
6
Lo:50
6 am
Hi:70
10
Lo:70
12 pm
Hi:75
16
Lo:57
6 pm
Hi:73
10
Thu, May 24
Lo:48
12 am
Hi:57
5
Lo:48
6 am
Hi:68
4
Lo:68
12 pm
Hi:79
11
Lo:63
6 pm
Hi:77
10
Fri, May 25
Lo:59
12 am
Hi:63
9
Lo:59
6 am
Hi:72
12
Lo:66
12 pm
Hi:79
14
Lo:63
6 pm
Hi:66
8
Sat, May 26
Lo:63
12 am
Hi:63
5
Lo:63
6 am
Hi:70
5
Lo:68
12 pm
Hi:70
5
Lo:63
6 pm
Hi:70
7
Sun, May 27
Lo:57
12 am
Hi:63
11
Lo:55
6 am
Hi:64
10
Lo:64
12 pm
Hi:73
9
Lo:64
6 pm
Hi:73
9
Mon, May 28
Lo:59
12 am
Hi:64
6
Lo:61
6 am
Hi:66
5
Lo:66
12 pm
Hi:77
4
Lo:68
6 pm
Hi:77
7
Tue, May 29
Lo:63
12 am
Hi:68
11
Lo:63
6 am
Hi:70
10
Lo:70
12 pm
Hi:77
7
Lo:59
6 pm
Hi:77
5
Wed, May 30
Lo:52
12 am
Hi:61
8
Lo:54
6 am
Hi:77
11
Lo:77
12 pm
Hi:84
7
Lo:72
6 pm
Hi:84
7
Thu, May 31
Lo:68
12 am
Hi:73
7
Lo:68
6 am
Hi:77
11
Lo:73
12 pm
Hi:77
10
Lo:72
6 pm
Hi:77
6
Tuesday, May 1, 2018, 12:00 am — 6:00 am
43 / 34 °F
Passing clouds.
Humidity: 97%
Barometer: 30 "Hg
S
Wind: 4.35 mph
High & Low Weather Summary for May 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 84 °F (May 30, 4:00 pm) | 100% (May 1, 1:00 am) | 30.47 "Hg (May 1, 1:00 am) |
| Low | 34 °F (May 1, 6:00 am) | 16% (May 23, 7:00 pm) | 29.30 "Hg (May 4, 8:00 pm) |
| Average | 60 °F | 61% | 29.97 "Hg |
| * Reported May 1 12:00 am — May 31 11:00 pm, Ottawa. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Ottawa Weather History for May 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:00 am Tue, May 1 |  | 43 °F | Passing clouds. | 5 mph | ↑ | 93% | 30.01 "Hg | 15 mi |
| 1:00 am | | 37 °F | Passing clouds. | 3 mph | ↑ | 100% | 30.01 "Hg | 15 mi |
| 2:00 am |  | 43 °F | Clear. | 6 mph | ↑ | 93% | 30.01 "Hg | 15 mi |
| 3:10 am | | 36 °F | Clear. | 3 mph | ↑ | 100% | 29.99 "Hg | 15 mi |
| 4:00 am | | 37 °F | Clear. | 5 mph | ↑ | 93% | 29.99 "Hg | 15 mi |
| 5:00 am | | 37 °F | Passing clouds. | 5 mph | ↑ | 100% | 30.00 "Hg | 15 mi |
| 5:31 am | | 36 °F | Passing clouds. | 2 mph | ↑ | 100% | 30.01 "Hg | 15 mi |
| 6:00 am |  | 34 °F | Passing clouds. | 5 mph | ↑ | 100% | 30.01 "Hg | 15 mi |
| 7:00 am | | 39 °F | Passing clouds. | 5 mph | ↑ | 100% | 30.01 "Hg | 15 mi |
| 8:00 am | | 45 °F | Partly sunny. | 3 mph | ↑ | 93% | 30.01 "Hg | 15 mi |
| 8:21 am |  | 46 °F | Light rain. Broken clouds. | 6 mph | ↑ | 87% | 30.02 "Hg | 15 mi |
| 9:00 am | | 46 °F | Partly sunny. | 7 mph | ↑ | 82% | 30.02 "Hg | 15 mi |
| 10:00 am | | 48 °F | Partly sunny. | 5 mph | ↑ | 71% | 30.01 "Hg | 15 mi |
| 11:00 am | | 55 °F | Partly sunny. | 7 mph | ↑ | 51% | 30.01 "Hg | 15 mi |
| 1:00 pm | | 61 °F | Partly sunny. | 12 mph | ↑ | 36% | 29.98 "Hg | 15 mi |
| 2:00 pm | | 63 °F | Partly sunny. | 10 mph | ↑ | 37% | 29.96 "Hg | 15 mi |
| 3:00 pm | | 66 °F | Partly sunny. | 13 mph | ↑ | 32% | 29.95 "Hg | 15 mi |
| 4:00 pm | | 66 °F | Partly sunny. | 12 mph | ↑ | 37% | 29.93 "Hg | 15 mi |
| 5:00 pm | | 66 °F | Broken clouds. | 9 mph | ↑ | 37% | 29.91 "Hg | 15 mi |
| 6:00 pm | | 64 °F | Broken clouds. | 13 mph | ↑ | 37% | 29.90 "Hg | 15 mi |
| 7:00 pm | | 64 °F | Broken clouds. | 8 mph | ↑ | 40% | 29.89 "Hg | 15 mi |
| 8:00 pm | | 63 °F | Broken clouds. | 7 mph | ↑ | 45% | 29.88 "Hg | 15 mi |
| 9:00 pm | | 63 °F | Passing clouds. | 9 mph | ↑ | 42% | 29.88 "Hg | 15 mi |
| 10:00 pm | | 61 °F | Clear. | 7 mph | ↑ | 45% | 29.89 "Hg | 15 mi |
| 11:00 pm | | 59 °F | Clear. | 7 mph | ↑ | 48% | 29.87 "Hg | 15 mi |
| Weather by CustomWeather, © 2025 | ||||||||