Okmulgee, Oklahoma climate: Normal weather by month, frost dates and records
Okmulgee's normal year runs from 26°F January nights to 93°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.6°C, January lows of −3°C, July highs of 34°C.
- NOAA stationOkmulgee Water Works
- Station IDUSC00346670
- Location35.62°N 96.03°W
- Elevation647 ft (197 m)
- Population11,354
On October 14, the normal high in Okmulgee is 76°F and the normal low 48°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Okmulgee.
- Jan 50° 26°
- Feb 55° 29°
- Mar 64° 39°
- Apr 72° 47°
- May 79° 57°
- Jun 87° 66°
- Jul 93° 70°
- Aug 92° 68°
- Sep 84° 60°
- Oct 75° 48°
- Nov 62° 37°
- Dec 53° 29°
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 Okmulgee each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 26°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 50°F | 26°F | 37.9°F | – | <1 | 24 | 10 h |
| February | 55°F | 29°F | 41.7°F | – | <1 | 17 | 10 h 50 min |
| March | 64°F | 39°F | 51.0°F | – | <1 | 9 | 11 h 50 min |
| April | 72°F | 47°F | 59.6°F | – | <1 | 2 | 13 h |
| May | 79°F | 57°F | 68.0°F | – | 2 | <1 | 14 h |
| June | 87°F | 66°F | 76.6°F | – | 10 | <1 | 14 h 30 min |
| July | 93°F | 70°F | 81.6°F | – | 24 | <1 | 14 h 20 min |
| August | 92°F | 68°F | 79.9°F | – | 22 | <1 | 13 h 30 min |
| September | 84°F | 60°F | 72.2°F | – | 8 | <1 | 12 h 30 min |
| October | 75°F | 48°F | 61.1°F | – | 1 | 2 | 11 h 20 min |
| November | 62°F | 37°F | 49.6°F | – | <1 | 11 | 10 h 20 min |
| December | 53°F | 29°F | 40.8°F | – | <1 | 22 | 9 h 50 min |
| Year (annual) | 72°F | 48°F | 60.0°F | – | 67 | 87 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 10°C | −3°C | 3.3°C |
| February | 13°C | −2°C | 5.4°C |
| March | 18°C | 4°C | 10.6°C |
| April | 22°C | 8°C | 15.3°C |
| May | 26°C | 14°C | 20.0°C |
| June | 31°C | 19°C | 24.8°C |
| July | 34°C | 21°C | 27.6°C |
| August | 33°C | 20°C | 26.6°C |
| September | 29°C | 16°C | 22.3°C |
| October | 24°C | 9°C | 16.2°C |
| November | 17°C | 3°C | 9.8°C |
| December | 12°C | −2°C | 4.9°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Okemah (21 miles away), gets 5 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00346670; 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 Okmulgee?
Normal highs sit between 65°F and 85°F in April, May, September and October.
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 USC00346670.
When is the last frost in Okmulgee?
In Okmulgee, the last spring frost (32°F) comes after April 8 in half of years and after April 25 in one year in ten; the first autumn frost comes before October 28 in half of years and before October 12 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 81 year in 10 after April 25; 9 in 10 after March 23
- First autumn frost, half of years before
- October 281 year in 10 before October 12; 9 in 10 before November 11
NOAA puts the median frost-free season at 203 days, and the season without a hard freeze (28°F) at 224 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Okmulgee in zone 7b in ZIP code 74447, 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 USC00346670; 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 Okmulgee?
In a normal year in Okmulgee, 67 days a year reach 90°F (14 of them 100°F or more) and 87 nights fall to 32°F or colder.
- Days at 90°F or more
- 67a normal year
- Days at 100°F or more
- 14a normal year
- Nights at 32°F or colder
- 87a normal year
- Days that stay below freezing
- 7high of 32°F or less
The highest temperature in this station's record (since 1910) is 114°F, on July 19, 1936; the lowest is −18°F, on January 22, 1930.
The wettest calendar year on that record is 1945, with 61.20 in; the snowiest season is 1958–59, with 20.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00346670; records: ACIS (NOAA Regional Climate Centers), station USC00346670. Records use complete months only; a month missing more than three days is left out.
How sunny is Okmulgee?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Okmulgee, 4.6 kWh per square metre a day. July is the sunniest month (87%) and February the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.7 |
| February | 71% | 3.3 |
| March | 72% | 4.3 |
| April | 74% | 5.3 |
| May | 74% | 5.7 |
| June | 84% | 6.7 |
| July | 87% | 6.7 |
| August | 85% | 6.0 |
| September | 82% | 5.0 |
| October | 78% | 3.8 |
| November | 77% | 2.9 |
| December | 72% | 2.3 |
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 Okmulgee need?
A normal year in Okmulgee brings 3,599 heating degree days, 33% fewer than the median U.S. place (5,373), and 1,812 cooling degree days, 100% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,917 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 839 | 0 |
| February | 653 | 0 |
| March | 443 | 8 |
| April | 201 | 39 |
| May | 49 | 141 |
| June | 2 | 350 |
| July | 0 | 513 |
| August | 0 | 464 |
| September | 21 | 237 |
| October | 176 | 55 |
| November | 468 | 6 |
| December | 749 | 0 |
| Year (annual) | 3,599 | 1,812 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00346670. 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 Okmulgee's climate compare?
Okmulgee is warmer than 54 of the other 133 places with their own NOAA record in Oklahoma. Across the 7,247 U.S. stations with normals, its annual mean of 60.0°F is warmer than 75%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Okmulgee share this climate record?
11 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Henryetta, OK5,606 people · 13 mi S
- Morris, OK1,334 people · 9 mi E
- Beggs, OK1,184 people · 8 mi N
- Dewar, OK760 people · 12 mi S
- Winchester, OK554 people · 12 mi N
- Schulter, OK433 people · 9 mi SE
- Preston, OK192 people · 6 mi N
- Grayson, OK134 people · 12 mi SE
- Hoffman, OK85 people · 14 mi SE
- Hitchita, OK63 people · 17 mi SE
- Stidham, OK19 people · 25 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Okmulgee's climate
What is the coldest month in Okmulgee?
January, with a normal high of 50°F and a normal low of 26°F. The warmest is July (93°F by day, 70°F at night).
Does it snow in Okmulgee?
Yes. NOAA publishes no 1991-2020 snowfall normal for Okmulgee's NOAA station; the nearest record that keeps one, Okemah (21 miles away), records 5 inches of snow in a normal year.
What plant hardiness zone is Okmulgee in?
The USDA's 2023 map puts Okmulgee in zone 7b in ZIP code 74447, the nearest ZIP area.
How late can frost come in Okmulgee?
In half of years the last 32°F night comes after April 8; in one year in ten it comes after April 25. Waiting until April 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oklahoma climateThe statewide normals and every place in the state
- Okemah, OK21 miles from this station, 61.8°F a year
- Bristow, OK25 miles from this station, 59.5°F a year
- Bixby, OK26 miles from this station, 60.0°F a year
- Tulsa R.L. Jones Jr. Airport, OK29 miles from this station, 61.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made