Jefferson, OK climate
Jefferson has chilly winters and hot summers. A typical July afternoon reaches 95°, a January night drops to 24°, and about 9 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Jefferson feels like
Winter
Spring
Summer
Fall
Jefferson 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 | 47° | 24° | 1.0" | 2.5" | 4 | 30° – 45° |
| February | 52° | 28° | 1.3" | 2.1" | 5 | 33° – 48° |
| March | 62° | 37° | 2.4" | 1.7" | 7 | 42° – 59° |
| April | 71° | 45° | 3.4" | 0 | 6 | 52° – 65° |
| May | 80° | 56° | 4.6" | 0 | 9 | 62° – 75° |
| June | 90° | 66° | 4.4" | 0 | 10 | 73° – 84° |
| July | 95° | 70° | 3.5" | 0 | 6 | 77° – 90° |
| August | 93° | 69° | 3.7" | 0 | 7 | 74° – 87° |
| September | 85° | 60° | 2.5" | 0 | 6 | 69° – 80° |
| October | 73° | 48° | 3.0" | 0 | 6 | 53° – 66° |
| November | 60° | 35° | 1.7" | 0.1" | 5 | 41° – 55° |
| December | 49° | 26° | 1.4" | 2.9" | 5 | 28° – 42° |
| Year | 72° | 47° | 32.7" | 9.3" | 77 |
“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 Jefferson
Jefferson gets 33 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 77 days a year.
About 199 frost-free days a year
In half of years the last 32° night comes by April 10 and the first one by October 28. That leaves about 199 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Jefferson
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Jefferson, 69% of that work is heating and 31% is cooling.
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 Jefferson 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 Jefferson averaged 1.1° warmer than the 1900s. The biggest change is in January (+2.7°). The shift is smaller than in 60% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Jefferson’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 42° to 59°. June is the most reliable, staying within 10°.
Common questions about Jefferson’s climate
What is the coldest month in Jefferson?
January, with a typical high of 47° and a low of 24°.
What is the hottest month in Jefferson?
July, with a typical high of 95° and a low of 70°. About 80 days a year reach 90°.
How much snow does Jefferson get?
About 9 inches in a normal winter, most of it in December.
When is the first frost in Jefferson?
In half of years the first 32° night comes by October 28, and the last spring frost by April 10.
What is the rainiest month in Jefferson?
May, with 4.6 inches of rain and melted snow. The year totals 33 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Jefferson itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Medford, OK (6 mi, snow) and Medford 1sw Mesonet, OK (6 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.