O'Neill Weather in September

What's the weather like in O'Neill (Nebraska) in September 2025?

The climate in O'Neill during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in O'Neill and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 9°C (48°F) is normal.

O'Neill weather averages (imperial / metric)
Daytime temperature 24.3°C 75.7°F
Nightly temperature 9.1°C 48.4°F
Average temperature 16.7°C 62.1°F
Daily sunshine 9.3 hrs
Avg rainfall 62 mm 2.5 ins
Rainy days 8 days
Sea temperature 17.6°C 63.6°F
Humidity 65%
Windspeed 17.6kph 11 mph

On average September is the 6th wettest month of the year in O'Neill with around 62mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.3 hours of sunshine per day.

September temperatures in O'Neill

O'Neill average temperature in September

September rainfall

O'Neill average rain in September

September hourly sunshine

O'Neill average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in O'Neill in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

O'Neill weather stats

O'Neill weather statistics
Hottest month: July 30.6°C 87.1°F
Driest month: January 12mm 0.5ins
Sunniest month: July 12.3hrs
Coldest month: January -1.1°C 30°F
Wettest month: June 104mm 4.1ins
Map showing location of O'Neill (42.45778, -98.64759) O'Neill map pin © Google

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