Ellis County Courthouse · Photo: Ammodramus · CC0Arnett’s winters are milder than most of the U.S.; July afternoons average 93°
A typical July afternoon reaches 93°, a January night drops to 23°.
A year in Arnett at a glance
Each month’s typical high and low, and what it brings.
What stands out about Arnett’s climate
Compared with towns across the U.S., with Arnett’s place in Oklahoma beside it.
What a year in Arnett feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 194 frost-free days a year
In half of years the last 32° night comes by April 15 and the first by October 27. Frost and day counts come from NOAA’s station at Arnett 3ne, OK, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Arnett’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 2°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 25 inches of rain a year
June is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Arnett
75% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Arnett 3ne, OK.
Living with Arnett’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
194 frost-free days in zone 7a. The last frost comes by Apr 15 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 27.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Arnett from natural hazards, drought is the largest share (34%); heat waves, cold waves, winter storms and ice storms together are 28%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Arnett and similar climates
TownRatings has no climate map of the towns around Arnett yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Arnett averaged 0.9° warmer than the 1900s. The biggest change is in January (+2.6°).
A smaller shift than in 82% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Arnett compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Arnett’s place among Oklahoma’s.
Arnett weather by month
Highs, lows and precipitation from NOAA’s grid at Arnett’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 49° | 23° | 0.8" | 30° – 44° |
| February | 53° | 27° | 0.9" | 33° – 48° |
| March | 62° | 35° | 1.7" | 42° – 58° |
| April | 71° | 43° | 2.3" | 51° – 63° |
| May | 79° | 54° | 3.4" | 61° – 75° |
| June | 88° | 63° | 3.7" | 70° – 83° |
| July | 93° | 68° | 2.6" | 77° – 88° |
| August | 92° | 66° | 3.0" | 73° – 85° |
| September | 84° | 58° | 1.9" | 67° – 79° |
| October | 72° | 46° | 2.5" | 53° – 66° |
| November | 60° | 34° | 1.0" | 40° – 54° |
| December | 49° | 25° | 1.1" | 30° – 41° |
| Year | 71° | 45° | 24.7" |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 42° to 58°. July is the most reliable, staying within 11°.
Where Arnett’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Arnett’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Arnett 3ne, OK, 4 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Arnett’s climate
What is the weather like in Arnett?
A typical July afternoon reaches 93°, a January night drops to 23°. Milder January nights than 58% of U.S. towns; hotter July afternoons than 91% of U.S. towns.
How cold does it get in Arnett in winter?
January nights average 23°. About 116 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 30°.
How hot does it get in Arnett?
July, with a typical high of 93° and a low of 68°. About 62 days a year reach 90° and 8 reach 100° (Arnett 3ne, OK).
When is the first and last frost in Arnett?
In half of years the last spring frost (32°) comes by April 15 and the first fall frost by October 27, about 194 frost-free days, at Arnett 3ne, OK.
What growing zone is Arnett in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 2°.
What is the best time of year to visit Arnett?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Arnett getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Arnett.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.