Ottawa, Canada 14-Day Forecast
Canada 🇨🇦
73°
Partly Cloudy right now
Today: high 80°, low 56°
Updated 3 hours ago
Ottawa weather for the next 14 days
Thursday, August 27
Mist High 72° Low 59°Precipitation
83%
· 0.25 in
Max wind
11 mph
Humidity
89%
UV index
4 - Moderate
Sunrise / sunset
06:18 AM / 07:50 PM
Friday, August 28
Sunny High 67° Low 49°Precipitation
13%
· 0.0 in
Max wind
11 mph
Humidity
74%
UV index
5 - Moderate
Sunrise / sunset
06:19 AM / 07:48 PM
Saturday, August 29
Sunny High 74° Low 50°Precipitation
8%
· 0.0 in
Max wind
12 mph
Humidity
66%
UV index
6 - High
Sunrise / sunset
06:20 AM / 07:46 PM
Sunday, August 30
Overcast High 72° Low 50°Precipitation
80%
· 0.11 in
Max wind
12 mph
Humidity
86%
UV index
5 - Moderate
Sunrise / sunset
06:22 AM / 07:44 PM
Monday, August 31
Overcast High 67° Low 50°Precipitation
28%
· 0.0 in
Max wind
7 mph
Humidity
81%
UV index
4 - Moderate
Sunrise / sunset
06:23 AM / 07:43 PM
Tuesday, September 1
Light rain shower High 59° Low 52°Precipitation
94%
· 2.6 in
Max wind
10 mph
Humidity
96%
UV index
3 - Moderate
Sunrise / sunset
06:24 AM / 07:41 PM
Wednesday, September 2
Fog High 62° Low 55°Precipitation
84%
· 0.06 in
Max wind
9 mph
Humidity
98%
UV index
4 - Moderate
Sunrise / sunset
06:25 AM / 07:39 PM
Thursday, September 3
Overcast High 64° Low 57°Precipitation
36%
· 0.0 in
Max wind
8 mph
Humidity
89%
UV index
4 - Moderate
Sunrise / sunset
06:26 AM / 07:37 PM
Friday, September 4
Overcast High 66° Low 55°Precipitation
19%
· 0.0 in
Max wind
11 mph
Humidity
79%
UV index
5 - Moderate
Sunrise / sunset
06:28 AM / 07:35 PM
Saturday, September 5
Sunny High 71° Low 51°Precipitation
12%
· 0.0 in
Max wind
10 mph
Humidity
79%
UV index
6 - High
Sunrise / sunset
06:29 AM / 07:33 PM
Sunday, September 6
Fog High 59° Low 56°Precipitation
75%
· 0.03 in
Max wind
7 mph
Humidity
96%
UV index
3 - Moderate
Sunrise / sunset
06:30 AM / 07:31 PM
Monday, September 7
Overcast High 74° Low 54°Precipitation
24%
· 0.0 in
Max wind
4 mph
Humidity
85%
UV index
6 - High
Sunrise / sunset
06:31 AM / 07:29 PM
Tuesday, September 8
Overcast High 65° Low 47°Precipitation
15%
· 0.0 in
Max wind
6 mph
Humidity
78%
UV index
5 - Moderate
Sunrise / sunset
06:32 AM / 07:28 PM
Ottawa 14-day outlook: the story
The warmest day of Ottawa's 14-day outlook is Wednesday, August 26 with a high near 80°F (27°C); the coolest night comes Tuesday, September 8, dipping to 47°F (8°C). The trend points cooler: week two runs about 4°F below week one. Highs over the next two weeks average 70°F (21°C), about 7°F (4°C) below the typical August high of 77°F (25°C).
Precipitation is most likely on Thursday 27, Sunday 30, Tuesday 1, Wednesday 2 and beyond; the wettest day looks like Tuesday, September 1 with about 2.6 in (66.1 mm) expected. For the weekend, expect Saturday 74°F (23°C) and sunny / Sunday 72°F (22°C) and overcast.
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 5 of the next 14 days, peaking around Tuesday, September 1.
What will be the warmest day in Ottawa over the next 14 days?
Wednesday, August 26, with a forecast high near 80°F (27°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