See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
19°
Drizzle
Feels Like: 17°
Min: 18°
Max: 28°
The next few hours will be humid and mostly cloudy, with tomorrow reaching 27°C and dropping to 14°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:56
Sunrise
19:11
Sunset
Moon
Waxing Crescent
11:49
Moonrise
20:44
Moonset
Daily Forecast
Tuesday
Today
Thursday
Friday
Saturday
Sunday
Monday
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Wednesday
Thursday
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Weather in Ottumwa tomorrow, September 16, 2026
Expect a muted, overcast feel in Ottumwa on September 16, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. The first half of the day looks overcast, as cloud amounts reach about 100% around 00:00. Brighter weather, if it comes, waits until later.
The day peaks near 27°C and cools toward 17°C. Moisture in the air spans 34%-94%, with the highest values around 00:00. Airflow remains manageable, reaching about 3.9 km/h around 16:00.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 14.5 km on average, though it can drop toward 12.1 km in thicker cloud or showers. The sun rises at 06:57 and sets at 19:10, for a total of 12 hours 12 minutes of sunlight today.
The practical takeaway for Ottumwa on September 16, 2026 is a cloudy day that stays usable, just not particularly bright, around 27°C.
Frequently asked questions about weather in Ottumwa
How warm does it get in Ottumwa?
The warmest month in Ottumwa is July, with average high temperatures of 31°C. The average temperature during this period is around 25°C.
How cold does it get in Ottumwa?
The coldest month in Ottumwa is January, with average low temperatures of -8°C. The average temperature during this period is around -4°C.
What is the wettest time of year in Ottumwa?
The wettest month in Ottumwa is May, with an average of 123mm of precipitation.
What is the driest time of year in Ottumwa?
The driest month in Ottumwa is February, with an average of 39mm of precipitation.
