O'Brien County Climate
O'Brien County, Iowa
Avg Annual Temp
46.1°F
Annual Precip
31.5"
Annual Snowfall
39.0"
Extreme Heat Days
11.300000000000002
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About O'Brien County Weather
Cold and Dry Northern Climate
O'Brien County's 46.1°F average is well below the national median. It receives a moderate 31.5 inches of precipitation annually, which is low for the state.
Below the State Average
This county is 1.9 degrees colder than the Iowa state average of 48.0°F. Its northern location leads to much harsher winters than southern Iowa.
Northern Snow Patterns
O'Brien is snowier than Monona but slightly warmer than Osceola. It experiences 39.0 inches of snow annually, which is significantly higher than counties further south.
Long Winters, Mild Summers
Winters are defined by 39 inches of snow and a 16.0°F January average. Summer is mild, with only 11 days per year reaching or exceeding 90°F.
Invest in Winter Tools
A high-quality snowblower is a necessity for the 39-inch annual snowfall. Energy bills will skew toward heating rather than cooling, given the rare occurrence of extreme heat.
Frequently Asked Questions
What is the average temperature in O'Brien County?
How much rain does O'Brien County get?
Does it snow in O'Brien County?
How hot does O'Brien County get in summer?
How cold are winters in O'Brien County?
Track your own weather in O'Brien County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.