Ottawa, Canada 14-Day Forecast
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60°
Overcast right now
Today: high 60°, low 44°
Updated just now
Ottawa weather for the next 14 days
Wednesday, September 16
Overcast High 73° Low 56°Precipitation
10%
· 0.0 in
Max wind
9 mph
Humidity
70%
UV index
5 - Moderate
Sunrise / sunset
06:42 AM / 07:12 PM
Thursday, September 17
Sunny High 68° Low 49°Precipitation
9%
· 0.0 in
Max wind
6 mph
Humidity
73%
UV index
4 - Moderate
Sunrise / sunset
06:43 AM / 07:10 PM
Friday, September 18
Sunny High 59° Low 46°Precipitation
8%
· 0.0 in
Max wind
13 mph
Humidity
63%
UV index
5 - Moderate
Sunrise / sunset
06:45 AM / 07:08 PM
Saturday, September 19
Sunny High 59° Low 39°Precipitation
8%
· 0.0 in
Max wind
6 mph
Humidity
64%
UV index
5 - Moderate
Sunrise / sunset
06:46 AM / 07:06 PM
Sunday, September 20
Sunny High 66° Low 41°Precipitation
6%
· 0.0 in
Max wind
4 mph
Humidity
66%
UV index
5 - Moderate
Sunrise / sunset
06:47 AM / 07:04 PM
Monday, September 21
Overcast High 63° Low 46°Precipitation
16%
· 0.0 in
Max wind
7 mph
Humidity
71%
UV index
5 - Moderate
Sunrise / sunset
06:48 AM / 07:03 PM
Tuesday, September 22
Sunny High 65° Low 48°Precipitation
8%
· 0.0 in
Max wind
10 mph
Humidity
66%
UV index
5 - Moderate
Sunrise / sunset
06:49 AM / 07:01 PM
Wednesday, September 23
Patchy rain nearby High 54° Low 50°Precipitation
78%
· 0.16 in
Max wind
11 mph
Humidity
77%
UV index
3 - Moderate
Sunrise / sunset
06:51 AM / 06:59 PM
Thursday, September 24
Fog High 62° Low 53°Precipitation
82%
· 0.06 in
Max wind
8 mph
Humidity
96%
UV index
4 - Moderate
Sunrise / sunset
06:52 AM / 06:57 PM
Friday, September 25
Light rain shower High 73° Low 59°Precipitation
94%
· 0.88 in
Max wind
12 mph
Humidity
96%
UV index
5 - Moderate
Sunrise / sunset
06:53 AM / 06:55 PM
Saturday, September 26
Light rain shower High 69° Low 50°Precipitation
93%
· 1.36 in
Max wind
14 mph
Humidity
96%
UV index
5 - Moderate
Sunrise / sunset
06:54 AM / 06:53 PM
Sunday, September 27
Overcast High 59° Low 47°Precipitation
11%
· 0.0 in
Max wind
10 mph
Humidity
68%
UV index
5 - Moderate
Sunrise / sunset
06:56 AM / 06:51 PM
Monday, September 28
Sunny High 59° Low 43°Precipitation
7%
· 0.0 in
Max wind
8 mph
Humidity
65%
UV index
5 - Moderate
Sunrise / sunset
06:57 AM / 06:49 PM
Ottawa 14-day outlook: the story
The warmest day of Ottawa's 14-day outlook is Wednesday, September 16 with a high near 73°F (23°C); the coolest night comes Saturday, September 19, dipping to 39°F (4°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 64°F (18°C), about 7°F (4°C) below the typical September high of 71°F (22°C).
Precipitation is most likely on Wednesday 23, Thursday 24, Friday 25, Saturday 26; the wettest day looks like Saturday, September 26 with about 1.36 in (34.5 mm) expected. For the weekend, expect Saturday 59°F (15°C) and sunny / Sunday 66°F (19°C) and sunny.
For typical conditions month by month, see the Ottawa climate & average temperatures guide.
Ottawa forecast questions
Will it rain in Ottawa this week?
The forecast currently shows meaningful precipitation chances on 4 of the next 14 days, peaking around Saturday, September 26.
What will be the warmest day in Ottawa over the next 14 days?
Wednesday, September 16, with a forecast high near 73°F (23°C).
How accurate is a 14-day forecast for Ottawa?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Ottawa by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 25° | 8° | 11 | 3.0 in | 4.9 h/day | 76% |
| February | 28° | 9° | 12 | 2.9 in | 6.1 h/day | 73% |
| March | 37° | 20° | 11 | 3.0 in | 7.5 h/day | 70% |
| April | 51° | 32° | 13 | 4.2 in | 8.2 h/day | 66% |
| May | 67° | 46° | 11 | 3.4 in | 10.4 h/day | 66% |
| June | 74° | 56° | 13 | 4.5 in | 10.8 h/day | 71% |
| July | 80° | 63° | 13 | 4.2 in | 12.0 h/day | 72% |
| August | 77° | 62° | 13 | 4.8 in | 10.8 h/day | 76% |
| September | 71° | 55° | 9 | 3.0 in | 9.5 h/day | 76% |
| October | 57° | 44° | 12 | 4.1 in | 6.4 h/day | 77% |
| November | 43° | 31° | 12 | 3.0 in | 5.0 h/day | 76% |
| December | 32° | 20° | 12 | 3.5 in | 3.8 h/day | 78% |
14-day forecasts nearby