Duncan, NE climate
Duncan has cold winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 14°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Duncan feels like
Winter
Spring
Summer
Fall
Duncan 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 14° | 0.6" | 6.6" | 5 | 14 | 17° – 37° |
| February | 38° | 17° | 0.7" | 6.0" | 5 | 11 | 16° – 37° |
| March | 51° | 28° | 1.5" | 3.8" | 7 | 4 | 31° – 54° |
| April | 63° | 38° | 2.9" | 1.1" | 9 | 0 | 43° – 56° |
| May | 73° | 49° | 4.7" | 0 | 11 | 0 | 55° – 68° |
| June | 83° | 60° | 4.3" | 0 | 10 | 0 | 67° – 77° |
| July | 87° | 65° | 3.3" | 0 | 9 | 0 | 69° – 81° |
| August | 84° | 62° | 3.5" | 0 | 9 | 0 | 68° – 77° |
| September | 78° | 53° | 2.5" | 0 | 7 | 0 | 60° – 71° |
| October | 65° | 40° | 2.2" | 0.7" | 7 | 0 | 45° – 56° |
| November | 50° | 27° | 1.2" | 1.8" | 5 | 2 | 29° – 48° |
| December | 37° | 17° | 0.9" | 5.6" | 6 | 8 | 16° – 32° |
| Year | 62° | 39° | 28.3" | 25.6" | 89 | 39 |
“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 Duncan
Duncan gets 28 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 89 days a year. Snow covers the ground about 39 days of the year.
About 174 frost-free days a year
In half of years the last 32° night comes by April 21 and the first one by October 15. That leaves about 174 frost-free days for gardens, shorter than 56% of U.S. towns.
Heating and cooling a home in Duncan
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Duncan, 85% of that work is heating and 15% 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.
Duncan and its neighbors
Duncan borders 1 town with climate data. January nights across them vary by 0.0°. Butler has both the coldest January nights (14°) and the hottest July afternoons (87°). Duncan’s January low is 14° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Duncan 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 Duncan averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.0°). The shift is larger than in 59% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Duncan’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 31° to 54°. June is the most reliable, staying within 9°.
Common questions about Duncan’s climate
What is the coldest month in Duncan?
January, with a typical high of 34° and a low of 14°.
What is the hottest month in Duncan?
July, with a typical high of 87° and a low of 65°. About 32 days a year reach 90°.
How much snow does Duncan get?
About 26 inches in a normal winter, most of it in January.
When is the first frost in Duncan?
In half of years the first 32° night comes by October 15, and the last spring frost by April 21.
What is the rainiest month in Duncan?
May, with 4.7 inches of rain and melted snow. The year totals 28 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Duncan itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Columbus 3 Ne, NE (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.