Ottawa, Kansas Weather
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Climate of Ottawa: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Ottawa, with average daytime highs around 32°C. January is the coolest, when nights typically fall to about -6°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 38°C, so the seasons feel very different from each other.
The area receives about 1050 mm of rain in a typical year. Most of it falls from April to August (around 59% of the yearly total), and May is the wettest month at roughly 148 mm.
For outdoor plans and travel, September to October usually offer the most comfortable weather in Ottawa, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 3° | -6° | 34 mm | 79% |
| Feb | 6° | -5° | 44 mm | 77% |
| Mar | 13° | 1° | 69 mm | 75% |
| Apr | 20° | 7° | 106 mm | 73% |
| May | 24° | 13° | 148 mm | 76% |
| Jun | 29° | 19° | 142 mm | 77% |
| Jul | 32° | 21° | 101 mm | 71% |
| Aug | 31° | 20° | 125 mm | 70% |
| Sep | 27° | 15° | 94 mm | 71% |
| Oct | 19° | 7° | 92 mm | 72% |
| Nov | 12° | 1° | 48 mm | 75% |
| Dec | 6° | -4° | 43 mm | 80% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Ottawa. Values describe typical conditions, not a forecast.
About Ottawa weather
Ottawa sits within Kansas's continental Great Plains climate, prone to severe spring thunderstorms and tornadoes, about 60 km south-east of Topeka. Conditions turn hot with hot summers (June–August) with highs often above 33°C. By December, expect cold, windy winters (December–February). This page shows live, auto-refreshing weather for Ottawa: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Ottawa is about 60 km south-east of Topeka, in Kansas.
Ottawa sees cold, windy winters (December–February).
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Ottawa's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Ottawa, with average daytime highs of about 32°C and nights around 21°C.
The coldest nights come in January, when the average low is about -6°C and daytime highs reach around 3°C. Frost is possible on clear, calm nights.
Ottawa receives about 1050 mm of rain in a typical year. May is the wettest month at roughly 148 mm, and the main rainy period is April to August.
September to October usually offer the most comfortable weather in Ottawa, with mild daytime temperatures and little rain.
In November Ottawa typically sees daytime highs near 12°C and lows near 1°C, with about 48 mm of rain over the month and average humidity around 75%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Ottawa is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Ottawa's day-to-day weather follows the broader pattern of Kansas described above. See the hourly weather forecast or the air quality index for more detail.