Arnett, Oklahoma climate: Normal weather by month, frost dates and records
Arnett's normal year runs from 22°F January nights to 92°F July afternoons, with 25.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.7°C, January lows of −6°C, July highs of 33°C, 643 mm of precipitation a year.
- NOAA stationArnett (3 mi NE)
- Station IDUSC00340332
- Location36.17°N 99.72°W
- Elevation2,429 ft (740 m)
- Population486
On October 23, the normal high in Arnett is 69°F and the normal low 42°F, and the chance of measurable rain or snow is 15%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Arnett.
- Jan 47° 22°
- Feb 51° 25°
- Mar 61° 33°
- Apr 69° 41°
- May 78° 52°
- Jun 86° 63°
- Jul 92° 67°
- Aug 91° 65°
- Sep 82° 58°
- Oct 72° 45°
- Nov 59° 32°
- Dec 48° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Arnett each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 22°F. The most precipitation falls in June (3.64 in), the least in January (0.77 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 47°F | 22°F | 34.5°F | 0.77 | 3 | <1 | 28 | 10 h |
| February | 51°F | 25°F | 37.9°F | 0.96 | 4 | <1 | 22 | 10 h 50 min |
| March | 61°F | 33°F | 47.0°F | 1.67 | 5 | <1 | 16 | 11 h 50 min |
| April | 69°F | 41°F | 55.1°F | 2.35 | 6 | <1 | 4 | 13 h |
| May | 78°F | 52°F | 64.8°F | 3.45 | 7 | 4 | <1 | 14 h |
| June | 86°F | 63°F | 74.3°F | 3.64 | 8 | 9 | <1 | 14 h 40 min |
| July | 92°F | 67°F | 79.1°F | 2.52 | 6 | 21 | <1 | 14 h 20 min |
| August | 91°F | 65°F | 78.2°F | 2.98 | 7 | 20 | <1 | 13 h 30 min |
| September | 82°F | 58°F | 70.0°F | 1.99 | 6 | 7 | <1 | 12 h 30 min |
| October | 72°F | 45°F | 58.1°F | 2.59 | 5 | 1 | 3 | 11 h 20 min |
| November | 59°F | 32°F | 45.7°F | 1.08 | 4 | <1 | 16 | 10 h 20 min |
| December | 48°F | 24°F | 36.1°F | 1.31 | 4 | <1 | 27 | 9 h 40 min |
| Year (annual) | 70°F | 44°F | 56.7°F | 25.31 | 63 | 62 | 116 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 8°C | −6°C | 1.4°C | 20 mm |
| February | 10°C | −4°C | 3.3°C | 24 mm |
| March | 16°C | 1°C | 8.3°C | 42 mm |
| April | 21°C | 5°C | 12.8°C | 60 mm |
| May | 25°C | 11°C | 18.2°C | 88 mm |
| June | 30°C | 17°C | 23.5°C | 92 mm |
| July | 33°C | 19°C | 26.2°C | 64 mm |
| August | 33°C | 18°C | 25.7°C | 76 mm |
| September | 28°C | 14°C | 21.1°C | 51 mm |
| October | 22°C | 7°C | 14.5°C | 66 mm |
| November | 15°C | 0°C | 7.6°C | 27 mm |
| December | 9°C | −4°C | 2.3°C | 33 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00340332; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Arnett?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October has the fewest days with rain (5).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00340332.
When is the last frost in Arnett?
In Arnett, the last spring frost (32°F) comes after April 15 in half of years and after April 29 in one year in ten; the first autumn frost comes before October 27 in half of years and before October 14 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 151 year in 10 after April 29; 9 in 10 after April 1
- First autumn frost, half of years before
- October 271 year in 10 before October 14; 9 in 10 before November 8
NOAA puts the median frost-free season at 194 days, and the season without a hard freeze (28°F) at 213 days.
A hard freeze (28°F) comes after April 5 in half of springs and before November 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Arnett in zone 7a in ZIP code 73832, the nearest ZIP area.
Frost dates for every NOAA station in Oklahoma · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00340332; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Arnett?
In a normal year in Arnett, 62 days a year reach 90°F (8 of them 100°F or more), 116 nights fall to 32°F or colder and 63 days bring measurable precipitation.
- Days at 90°F or more
- 62a normal year
- Days at 100°F or more
- 8a normal year
- Nights at 32°F or colder
- 116a normal year
- Days that stay below freezing
- 15high of 32°F or less
- Days with 0.01 inch of precipitation
- 63a normal year
The highest temperature in this station's record (since 1911) is 110°F, on June 25, 1911; the lowest is −18°F, on January 12, 1912.
The wettest calendar year on that record is 1941, with 38.96 in; the snowiest season is 1992–93, with 49.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00340332; records: ACIS (NOAA Regional Climate Centers), station USC00340332. Records use complete months only; a month missing more than three days is left out.
How sunny is Arnett?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Arnett, 4.9 kWh per square metre a day. July is the sunniest month (88%) and February the cloudiest (76%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 80% | 2.8 |
| February | 76% | 3.6 |
| March | 79% | 4.8 |
| April | 80% | 5.9 |
| May | 81% | 6.6 |
| June | 87% | 7.3 |
| July | 88% | 7.1 |
| August | 87% | 6.3 |
| September | 86% | 5.3 |
| October | 82% | 4.0 |
| November | 82% | 3.1 |
| December | 79% | 2.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Arnett need?
A normal year in Arnett brings 4,456 heating degree days, 17% fewer than the median U.S. place (5,373), and 1,477 cooling degree days, 63% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,249 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 947 | 0 |
| February | 757 | 0 |
| March | 563 | 3 |
| April | 314 | 16 |
| May | 101 | 95 |
| June | 9 | 289 |
| July | 1 | 438 |
| August | 3 | 412 |
| September | 43 | 193 |
| October | 243 | 30 |
| November | 580 | 2 |
| December | 896 | 0 |
| Year (annual) | 4,456 | 1,477 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00340332. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Arnett's climate compare?
Arnett is warmer than 4 of the other 133 places with their own NOAA record in Oklahoma, and wetter than 8. Across the 7,247 U.S. stations with normals, its annual mean of 56.7°F is warmer than 66%.
In the Köppen classification computed from these normals, Arnett is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
What do Arnett's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Arnett. This page uses Arnett (3 mi NE); the other differs by site and elevation, and the linked ones have pages of their own:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Arnett 8 mi WSW Mesonet USC00340338 | 12 mi SW | 2,359 ft | 58.6°F | 24°F | 94°F | – | – | April 9 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Arnett's climate
What is the coldest month in Arnett?
January, with a normal high of 47°F and a normal low of 22°F. The warmest is July (92°F by day, 67°F at night).
What is the rainiest month in Arnett?
June, with 3.64 in of precipitation in a normal year; the driest is January with 0.77 in.
What plant hardiness zone is Arnett in?
The USDA's 2023 map puts Arnett in zone 7a in ZIP code 73832, the nearest ZIP area.
How late can frost come in Arnett?
In half of years the last 32°F night comes after April 15; in one year in ten it comes after April 29. Waiting until April 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oklahoma climateThe statewide normals and every place in the state
- Gage, OK9 miles from this station, 59.1°F a year
- Arnett 8 mi WSW Mesonet, OK12 miles from this station, 58.6°F a year
- Camargo, OK23 miles from this station, 58.4°F a year
- Woodward, OK25 miles from this station, 59.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made