Reilly, KS climate
Reilly has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 16°, and about 12 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Reilly feels like
Winter
Spring
Summer
Fall
Reilly 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 | 37° | 16° | 0.7" | 4.6" | 4 | 21° – 38° |
| February | 42° | 21° | 1.2" | 3.4" | 5 | 22° – 40° |
| March | 54° | 31° | 2.1" | 1.4" | 7 | 35° – 56° |
| April | 65° | 41° | 3.5" | 0.2" | 9 | 44° – 59° |
| May | 74° | 52° | 5.2" | 0 | 11 | 58° – 72° |
| June | 84° | 62° | 4.8" | 0 | 9 | 68° – 78° |
| July | 88° | 66° | 4.7" | 0 | 9 | 72° – 83° |
| August | 86° | 64° | 4.0" | 0 | 8 | 69° – 81° |
| September | 79° | 55° | 3.4" | 0 | 7 | 61° – 73° |
| October | 67° | 43° | 2.7" | 0.2" | 8 | 48° – 60° |
| November | 52° | 30° | 1.7" | 0.5" | 5 | 34° – 50° |
| December | 41° | 21° | 1.2" | 1.9" | 4 | 18° – 36° |
| Year | 64° | 42° | 35.2" | 12.2" | 88 |
“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 Reilly
Reilly gets 35 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 88 days a year.
About 172 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 14. That leaves about 172 frost-free days for gardens, shorter than 58% of U.S. towns.
Heating and cooling a home in Reilly
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Reilly, 83% of that work is heating and 17% 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.
Reilly and its neighbors
Reilly borders 3 towns with climate data. January nights across them vary by 0.4°. Harrison has the coldest January nights (16°) and Red Vermillion the hottest July afternoons (88°). Reilly’s January low is 16° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Reilly 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 Reilly averaged 0.7° warmer than the 1900s. The biggest change is in March (+2.1°). The shift is smaller than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Reilly’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 35° to 56°. June is the most reliable, staying within 10°.
Common questions about Reilly’s climate
What is the coldest month in Reilly?
January, with a typical high of 37° and a low of 16°.
What is the hottest month in Reilly?
July, with a typical high of 88° and a low of 66°. About 38 days a year reach 90°.
How much snow does Reilly get?
About 12 inches in a normal winter, most of it in January.
When is the first frost in Reilly?
In half of years the first 32° night comes by October 14, and the last spring frost by April 24.
What is the rainiest month in Reilly?
May, with 5.2 inches of rain and melted snow. The year totals 35 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Reilly itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Goff 3 Wsw, KS (4 mi, snow) and Holton, KS (15 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.