Columbus Junction, IA climate
Columbus Junction has cold, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 14°, and about 31 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Columbus Junction feels like
Winter
Spring
Summer
Fall
Columbus Junction weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 31° | 14° | 1.3" | 9.5" | 8 | 15° – 35° |
| February | 36° | 18° | 1.6" | 7.1" | 7 | 13° – 38° |
| March | 49° | 29° | 2.3" | 5.3" | 9 | 31° – 53° |
| April | 63° | 39° | 3.6" | 1.6" | 11 | 41° – 58° |
| May | 73° | 51° | 5.0" | 0 | 12 | 56° – 69° |
| June | 82° | 61° | 5.2" | 0 | 10 | 69° – 75° |
| July | 85° | 64° | 4.1" | 0 | 9 | 69° – 81° |
| August | 83° | 62° | 4.0" | 0 | 9 | 67° – 78° |
| September | 77° | 54° | 3.6" | 0 | 8 | 60° – 70° |
| October | 64° | 42° | 2.9" | 0.2" | 8 | 48° – 58° |
| November | 49° | 30° | 2.2" | 1.3" | 8 | 31° – 50° |
| December | 36° | 20° | 1.7" | 6.3" | 7 | 13° – 37° |
| Year | 61° | 40° | 37.5" | 31.3" | 105 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Columbus Junction
Columbus Junction gets 37 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 105 days a year.
About 167 frost-free days a year
In half of years the last 32° night comes by April 26 and the first one by October 10. That leaves about 167 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in Columbus Junction
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Columbus Junction, 89% of that work is heating and 11% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Columbus Junction compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Columbus Junction averaged 0.8° warmer than the 1900s. The biggest change is in December (+1.9°). The shift is smaller than in 86% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Columbus Junction’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 13° to 38°. June is the most reliable, staying within 6°.
Common questions about Columbus Junction’s climate
What is the coldest month in Columbus Junction?
January, with a typical high of 31° and a low of 14°.
What is the hottest month in Columbus Junction?
July, with a typical high of 85° and a low of 64°. About 17 days a year reach 90°.
How much snow does Columbus Junction get?
About 31 inches in a normal winter, most of it in January.
When is the first frost in Columbus Junction?
In half of years the first 32° night comes by October 10, and the last spring frost by April 26.
What is the rainiest month in Columbus Junction?
June, with 5.2 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Columbus Junction itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Columbus Junction, IA (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.