Weather in Ottawa — today
Now in Ottawa
🌙
+10°
Clear
Feels like +9° · humidity 93%
Today 12.9: +22° / +9°
🕐 01:25
Wind
2 km/h
UV index
0
Air (AQI)
38 · Good
Precipitation
4%
Humidity
93%
Pressure
1017 hPa
Sunrise / sunset
06:37 / 19:19
👕 What to wear today
Comfortable — a T-shirt, a light sweater for the evening.
Weather for an activity:
Detailed weather information for Ottawa
Today, 12 September, Saturday, in Ottawa (Canada): partly cloudy, moderately warm. During the day the air will warm up to +22°, at night around +9°. Due to the wind it feels like +9°. Wind up to 11 km/h. No precipitation expected, you won't need an umbrella. A T-shirt is comfortable during the day, but take a light sweater or windbreaker for the evening. The sun will rise at 06:37 and set at 19:19 — daylight lasts 13 hours.Hourly weather in Ottawa
💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Ottawa for 14 days
Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).
▶
Today 12.9
🌫️
💧 4%
+9° +22°
Morning
🌫️
+11°
Day
🌫️
+22°
Evening
🌇
+21°
Night
🌙
+9°
▶
Tomorrow 13.9
🌦️
💧 31%
+13° +22°
Morning
☁️
+19°
Day
🌦️
+22°
Evening
🌇
+19°
Night
🌙
+13°
▶
Mon 14.9
🌦️
💧 31%
+8° +18°
Morning
🌦️
+12°
Day
🌦️
+18°
Evening
🌇
+16°
Night
🌙
+8°
▶
Tue 15.9
🌦️
💧 28%
+8° +19°
Morning
🌦️
+12°
Day
🌦️
+19°
Evening
🌇
+16°
Night
🌙
+8°
▶
Wed 16.9
☁️
💧 28%
+15° +24°
Morning
☁️
+18°
Day
☁️
+24°
Evening
🌇
+22°
Night
🌙
+15°
▶
Thu 17.9
🌦️
💧 38%
+14° +19°
Morning
🌦️
+16°
Day
🌦️
+19°
Evening
🌇
+18°
Night
🌙
+14°
▶
Fri 18.9
🌦️
💧 26%
+11° +15°
Morning
🌦️
+12°
Day
🌦️
+15°
Evening
🌇
+14°
Night
🌙
+11°
▶
Sat 19.9
☁️
💧 16%
+9° +20°
Morning
☁️
+13°
Day
☁️
+20°
Evening
🌇
+17°
Night
🌙
+9°
▶
Sun 20.9
☁️
💧 10%
+8° +17°
Morning
☁️
+11°
Day
☁️
+17°
Evening
🌇
+15°
Night
🌙
+8°
▶
Mon 21.9
⛅
💧 10%
+7° +20°
Morning
⛅
+12°
Day
⛅
+20°
Evening
🌇
+17°
Night
🌙
+7°
▶
Tue 22.9
🌤️
💧 12%
+5° +16°
Morning
🌤️
+9°
Day
🌤️
+16°
Evening
🌇
+13°
Night
🌙
+5°
▶
Wed 23.9
☁️
💧 23%
+6° +16°
Morning
☁️
+10°
Day
☁️
+16°
Evening
🌇
+14°
Night
🌙
+6°
▶
Thu 24.9
☁️
💧 19%
+9° +18°
Morning
☁️
+12°
Day
☁️
+18°
Evening
🌇
+16°
Night
🌙
+9°
▶
Fri 25.9
☁️
💧 16%
+9° +19°
Morning
☁️
+13°
Day
☁️
+19°
Evening
🌇
+17°
Night
🌙
+9°
🗺️ Precipitation radar
Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.
Rain intensity:lightmoderateheavy
🎯 What to do in this weather — indices of the day
Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.
🏃 Running
94 / 100
comfort for running · Excellent
🧴 UV
0%
moderate · low
☂️ Rain
4%
unlikely · low
✨ Stars
85 / 100
evening visibility · Excellent
🧺 Laundry drying
50 / 100
will dry outside · Average
🚗 Car wash
90 / 100
no rain expected · Excellent
🌫️ Air quality
38
Good air
European AQI
PM2.5: 7PM10: 7O₃: 37NO₂: 24
The air is clean — you can walk and exercise outside.
🌅 Sun, moon and sea
Sunrise
06:37
Sunset
19:19
Golden hour
18:40
Daylight
13 h (-3 min vs yesterday)
Ottawa climate by month
Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.
-5°
-14°
Jan
-3°
-13°
Feb
+3°
-7°
Mar
+11°
+1°
Apr
+19°
+8°
May
+23°
+13°
Jun
+26°
+16°
Jul
+25°
+16°
Aug
+20°
+12°
Sep
+13°
+6°
Oct
+6°
-1°
Nov
-1°
-8°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|
| January | -5° | -14° | 73 mm | Proper winter: -5° daytime, frost and short days. Frequent rain (73 mm over the month) — keep indoor backup plans. ❄️ a warm jacket, a hat, non-slip shoes. This is the coldest month of the year. |
| February | -3° | -13° | 58 mm | The coldest stretch: -3° by day, full winter clothing required. ❄️ a warm jacket, a hat, non-slip shoes. |
| March | +3° | -7° | 72 mm | Cold: +3° by day, down to -7° at night — dress warmly. It's a rainy month (72 mm) — an umbrella is a must. ❄️ a warm jacket, a hat, non-slip shoes. |
| April | +11° | +1° | 90 mm | A fresh month — +11° daytime, take a jacket for walks. Frequent rain (90 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. |
| May | +19° | +8° | 88 mm | The most pleasant season: +19° by day, comfortable all day long. One of the wettest months (88 mm): downpours can derail plans. 🙂 a sweater for the evening. |
| June | +23° | +13° | 100 mm | One of the best times to visit: +23° by day, fresh nights. It's a rainy month (100 mm) — an umbrella is a must. 🙂 a sweater for the evening. Statistically the wettest month of the year. |
| July | +26° | +16° | 97 mm | Ideal weather: +26° daytime — neither hot nor cold. Frequent rain (97 mm over the month) — keep indoor backup plans. 😊 light summer clothing. This is the hottest month of the year in Ottawa. |
| August | +25° | +16° | 90 mm | The most pleasant season: +25° by day, comfortable all day long. One of the wettest months (90 mm): downpours can derail plans. 😊 light summer clothing. Weather-wise, one of the three best months to visit. |
| September | +20° | +12° | 95 mm | One of the best times to visit: +20° by day, fresh nights. It's a rainy month (95 mm) — an umbrella is a must. 🙂 a sweater for the evening. |
| October | +13° | +6° | 99 mm | A fresh month — +13° daytime, take a jacket for walks. Frequent rain (99 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. |
| November | +6° | -1° | 83 mm | A cold month: +6° by day, long walks get uncomfortable. One of the wettest months (83 mm): downpours can derail plans. 🧣 a warmer jacket. |
| December | -1° | -8° | 79 mm | Freezing: -1° by day, -8° at night — full winter gear, ice underfoot is common. It's a rainy month (79 mm) — an umbrella is a must. ❄️ a warm jacket, a hat, non-slip shoes. The shortest daylight of the year — it gets dark early. |
When to visit Ottawa
✅ Recommended time to visit
🌟 Best time: June, July, August
Daytime air+23…+26°
Precipitationoften
Why: comfortable +23…+26° by day, little rain.
⚠️ Doable, with caveats
🌤️ Shoulder season: January, February, March, May, September, October
Daytime air-5…+20°
Precipitationoften
Why: noticeable rain risk (58–99 mm/month) — pack an umbrella and backup plans.
🔴 Not the best time
❄️ Cold season: April, November, December
Daytime air-1…+11°
Precipitationoften
Why: cold and dark (-1…+11° by day, 9 h of daylight) — only if frost and short days don’t put you off.
Bottom line: the best time to visit Ottawa is June – August, and the most comfortable months are June, July, August. The toughest months to visit are April, November, December: frequent rain.
🌡️ Today vs the climate normal
Today's high
+22°
Normal for September
+20°
Deviation
2° warmer than normal
A year ago on this day
+19°
Record for this date
+29° (2005)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Ottawa
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
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Weather in cities near Ottawa
Frequently asked questions about the weather in Ottawa
What is the weather in Ottawa right now?＋
Clear, +10°, feels like +9°.
Will it rain in Ottawa today?＋
No: 4% chance, 0 mm.
When is the best time to visit Ottawa?＋
Best time to visit — June – August.
What time are sunrise and sunset in Ottawa?＋
Sunrise 06:37, sunset 19:19.
Does it snow in Ottawa in winter?＋
Yes, snow is possible in January, February, March, November, December.
What is the climate in Ottawa by month?＋
Summers up to +26° in July, winters around -14° in January; the wettest month is June.
Is it cold in Ottawa in winter?＋
🥶 Severe frost. You'll need a warm jacket, a hat with ear flaps, gloves and warm boots (felt boots); staying outside for long is dangerous — risk of frostbite.