Marietta has chilly winters and warm summers, with plenty of rain
A typical July afternoon reaches 90°, a January night drops to 26°, and about 4 inches of snow falls in a normal winter.
A year in Marietta at a glance
Each month’s typical high and low, and what it brings.
What stands out about Marietta’s climate
Read from where Marietta sits among Oklahoma’s towns. The page puts what stands out first.
What a year in Marietta feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
4 inches of snow, 50 of rain and melt
May is the wettest month and February the driest. Rain or snow falls on about 81 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 217 frost-free days a year
In half of years the last 32° night comes by March 31 and the first by November 4.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Marietta’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
217 frost-free days. The last frost comes by Mar 31 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 4.
About 4" in a normal winter.
Months averaging under 55° run from November through March. Heating is 71% of the year’s heating-and-cooling load.
About 43 days a year reach 90°, and July afternoons average 90°.
The nicest months are April, May, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Marietta and its neighbors
Stilwell has the coldest January nights next door (27°) and Stilwell the hottest July afternoons (91°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Marietta averaged 0.5° warmer than the 1900s. The biggest change is in February (+1.3°).
A smaller shift than in 96% of U.S. towns.
Change by month
How Marietta compares
Against every U.S. town on TownTapestry, each counted once, with its place in Oklahoma.
Marietta 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 | 48° | 26° | 2.8" | 1.7" | 5 | 2 | 33° – 46° |
| February | 53° | 31° | 2.5" | 1.5" | 5 | 1 | 34° – 50° |
| March | 61° | 39° | 4.2" | 0.5" | 7 | 0 | 43° – 59° |
| April | 70° | 47° | 5.0" | 0 | 8 | 0 | 53° – 65° |
| May | 78° | 56° | 6.1" | 0 | 9 | 0 | 64° – 73° |
| June | 85° | 64° | 4.9" | 0 | 9 | 0 | 71° – 80° |
| July | 90° | 68° | 4.1" | 0 | 7 | 0 | 74° – 86° |
| August | 90° | 67° | 4.0" | 0 | 5 | 0 | 72° – 84° |
| September | 83° | 60° | 4.5" | 0 | 6 | 0 | 67° – 78° |
| October | 72° | 48° | 4.5" | 0 | 7 | 0 | 54° – 66° |
| November | 60° | 38° | 4.1" | 0.3" | 7 | 0 | 43° – 57° |
| December | 50° | 30° | 3.4" | 0.3" | 5 | 0 | 27° – 46° |
| Year | 70° | 48° | 50.1" | 4.3" | 81 | 3 |
Heating and cooling a home in Marietta
71% of the work is heating.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 27° to 46°. May is the most reliable, staying within 9°.
Common questions about Marietta’s climate
What is the coldest month in Marietta?
January, with a typical high of 48° and a low of 26°.
What is the hottest month in Marietta?
July, with a typical high of 90° and a low of 68°. About 43 days a year reach 90°.
How much snow does Marietta get?
About 4 inches in a normal winter, most of it in January.
When is the first frost in Marietta?
In half of years the first 32° night comes by November 4, and the last spring frost by March 31.
What is the rainiest month in Marietta?
May, with 6.1 inches of rain and melted snow. The year totals 50 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Marietta.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Marietta itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tahlequah, OK (18 mi, snow) and Stilwell 5 Nnw, OK (3 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. Today’s forecast: National Weather Service.