Ottawa, WI
Unincorporated community in Waukesha County, Wisconsin
Ottawa is a small unincorporated community in Waukesha County, Wisconsin. It is 2.6 miles NW of Dousman, the nearest town. Its ZIP code is 53118.
Ottawa at a glance
- State
- Wisconsin
- County
- Waukesha County
- ZIP code
- 53118
- Nearest town
- Dousman (2.6 mi)
- Time zone
- America/Chicago
- Coordinates
- 42.9761, -88.4497
Weather in Ottawa now
Loading the National Weather Service forecast…
Ottawa weather by the hour
Ottawa weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Ottawa.
This week in Ottawa
Sunrise, sunset and moon in Ottawa
What is the weather usually like in Ottawa?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 82°F average high
- Januarycoldest month · 11°F average low
- 37.5 inprecipitation per year · 953 mm
- 50.7 insnowfall per year · 129 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Ottawa: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station SULLIVAN 3SE, WI US (USC00478316), adjusted for the elevation of Ottawa.
Ottawa weather month by month
Sunrise and sunset in Ottawa through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:20 AM | 4:46 PM | 9 h 25 min |
| February | 6:49 AM | 5:26 PM | 10 h 37 min |
| March | 7:03 AM | 7:01 PM | 11 h 57 min |
| April | 6:09 AM | 7:37 PM | 13 h 27 min |
| May | 5:28 AM | 8:11 PM | 14 h 43 min |
| June | 5:12 AM | 8:36 PM | 15 h 23 min |
| July | 5:27 AM | 8:32 PM | 15 h 5 min |
| August | 5:58 AM | 7:57 PM | 13 h 59 min |
| September | 6:32 AM | 7:05 PM | 12 h 33 min |
| October | 7:06 AM | 6:12 PM | 11 h 6 min |
| November | 6:44 AM | 4:31 PM | 9 h 47 min |
| December | 7:16 AM | 4:21 PM | 9 h 5 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Ottawa?
Ottawa has a warm-summer humid continental climate. The warmest month is July, with an average high of 82°F (28°C), and the coldest is January, with average lows of 11°F (-12°C).
It gets about 37.5 inches (953 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 51 inches fall in an average year.
The best time to visit Ottawa is June to September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Ottawa
The closest live webcam is Wauwatosa: I-41/US 45, 20.8 miles E of Ottawa.
Webcams: Windy.com. Distances in a straight line from Ottawa.
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Map of Ottawa, WI
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Ottawa Street View
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Other communities near Ottawa
Questions about Ottawa
Where is Ottawa, WI?
Ottawa is an unincorporated community in Waukesha County, Wisconsin, 2.6 miles NW of Dousman.
What county is Ottawa in?
Ottawa is in Waukesha County, Wisconsin.
What is the ZIP code of Ottawa, WI?
The ZIP code for Ottawa is 53118.
What is the nearest town to Ottawa?
Dousman, 2.6 miles away.
Are there webcams near Ottawa?
Yes. The closest is Wauwatosa: I-41/US 45, 20.8 miles away.
What is the hottest month in Ottawa?
July, with an average high of 82°F (28°C).
What is the coldest month in Ottawa?
January, with an average low of 11°F (-12°C).
How much does it rain in Ottawa?
About 37.5 inches (953 mm) a year; the wettest month is June.
Does it snow in Ottawa?
Yes, about 51 inches of snow fall in an average year.
When is the best time to visit Ottawa?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Ottawa have?
Warm-summer humid continental (Köppen Dfb).
Last updated: