Grandfield, Oklahoma climate: Normal weather by month, frost dates and records
Grandfield's normal year runs from 29°F January nights to 98°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.3°C, January lows of −2°C, July highs of 36°C.
- NOAA stationGrandfield 3 mi W Mesonet
- Station IDUSC00343707
- Location34.24°N 98.74°W
- Elevation1,122 ft (342 m)
- Population883
On October 23, the normal high in Grandfield is 73°F and the normal low 49°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grandfield.
- Jan 53° 29°
- Feb 58° 33°
- Mar 66° 41°
- Apr 74° 49°
- May 84° 59°
- Jun 94° 69°
- Jul 98° 73°
- Aug 96° 72°
- Sep 89° 64°
- Oct 76° 52°
- Nov 64° 39°
- Dec 54° 31°
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 Grandfield each month?
July is the warmest month, with normal highs of 98°F; January the coldest, with normal lows of 29°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 53°F | 29°F | 41.2°F | – | <1 | 22 | 10 h 10 min |
| February | 58°F | 33°F | 45.4°F | – | <1 | 16 | 11 h |
| March | 66°F | 41°F | 53.3°F | – | <1 | 6 | 11 h 50 min |
| April | 74°F | 49°F | 61.3°F | – | 2 | 1 | 13 h |
| May | 84°F | 59°F | 71.6°F | – | 11 | <1 | 14 h |
| June | 94°F | 69°F | 81.2°F | – | 25 | <1 | 14 h 30 min |
| July | 98°F | 73°F | 85.1°F | – | 27 | <1 | 14 h 10 min |
| August | 96°F | 72°F | 84.0°F | – | 27 | <1 | 13 h 30 min |
| September | 89°F | 64°F | 76.1°F | – | 16 | <1 | 12 h 30 min |
| October | 76°F | 52°F | 64.0°F | – | 3 | 1 | 11 h 20 min |
| November | 64°F | 39°F | 51.6°F | – | <1 | 7 | 10 h 20 min |
| December | 54°F | 31°F | 42.7°F | – | <1 | 19 | 9 h 50 min |
| Year (annual) | 76°F | 51°F | 63.1°F | – | 111 | 72 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 12°C | −2°C | 5.1°C |
| February | 14°C | 0°C | 7.4°C |
| March | 19°C | 5°C | 11.8°C |
| April | 23°C | 9°C | 16.3°C |
| May | 29°C | 15°C | 22.0°C |
| June | 34°C | 20°C | 27.3°C |
| July | 36°C | 23°C | 29.5°C |
| August | 36°C | 22°C | 28.9°C |
| September | 31°C | 18°C | 24.5°C |
| October | 24°C | 11°C | 17.8°C |
| November | 18°C | 4°C | 10.9°C |
| December | 12°C | 0°C | 5.9°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Chattanooga (14 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00343707; 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 Grandfield?
Normal highs sit between 65°F and 85°F in March, April, May 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 USC00343707.
When is the last frost in Grandfield?
In Grandfield, the last spring frost (32°F) comes after March 31 in half of years and after April 18 in one year in ten; the first autumn frost comes before November 6 in half of years and before October 23 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
- March 311 year in 10 after April 18; 9 in 10 after March 10
- First autumn frost, half of years before
- November 61 year in 10 before October 23; 9 in 10 before November 21
NOAA puts the median frost-free season at 219 days, and the season without a hard freeze (28°F) at 243 days.
A hard freeze (28°F) comes after March 18 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grandfield in zone 8a in ZIP code 73546, 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 USC00343707; 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 Grandfield?
In a normal year in Grandfield, 111 days a year reach 90°F (39 of them 100°F or more) and 72 nights fall to 32°F or colder.
- Days at 90°F or more
- 111a normal year
- Days at 100°F or more
- 39a normal year
- Nights at 32°F or colder
- 72a normal year
- Days that stay below freezing
- 4high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00343707.
How sunny is Grandfield?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Grandfield, 4.9 kWh per square metre a day. July is the sunniest month (88%) and February the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 3.0 |
| February | 74% | 3.6 |
| March | 77% | 4.8 |
| April | 79% | 5.9 |
| May | 79% | 6.3 |
| June | 86% | 7.1 |
| July | 88% | 7.0 |
| August | 88% | 6.4 |
| September | 84% | 5.3 |
| October | 82% | 4.1 |
| November | 81% | 3.2 |
| December | 76% | 2.6 |
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 Grandfield need?
A normal year in Grandfield brings 3,104 heating degree days, 42% fewer than the median U.S. place (5,373), and 2,457 cooling degree days, 2.7 times 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 5,762 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 738 | 0 |
| February | 552 | 2 |
| March | 376 | 13 |
| April | 165 | 56 |
| May | 33 | 238 |
| June | 0 | 487 |
| July | 0 | 623 |
| August | 0 | 589 |
| September | 8 | 341 |
| October | 133 | 100 |
| November | 409 | 8 |
| December | 690 | 0 |
| Year (annual) | 3,104 | 2,457 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00343707. 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.
Has Grandfield been warmer than normal lately?
2025 averaged 64.4°F, 1.3°F above the 1991-2020 normal of 63.1°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 63.2°F | +0.1°F |
| 2022 | 64.0°F | +0.9°F |
| 2023 | 65.0°F | +1.9°F |
| 2024 | 66.0°F | +2.9°F |
| 2025 | 64.4°F | +1.3°F |
Source: observed years: ACIS, station USC00343707. A year counts only with all twelve months complete.
How does Grandfield's climate compare?
Grandfield is warmer than 128 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 63.1°F is warmer than 83%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Grandfield share this climate record?
5 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.
- Burkburnett, TX11,101 people · 15 mi SE
- Iowa Park, TX6,583 people · 19 mi S
- Electra, TX2,249 people · 17 mi SW
- Harrold, TX90 people · 20 mi SW
- Loveland, OK14 people · 5 mi N
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 Grandfield's climate
What is the coldest month in Grandfield?
January, with a normal high of 53°F and a normal low of 29°F. The warmest is July (98°F by day, 73°F at night).
Does it snow in Grandfield?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Grandfield's NOAA station; the nearest record that keeps one, Chattanooga (14 miles away), records 1 inches of snow in a normal year.
What plant hardiness zone is Grandfield in?
The USDA's 2023 map puts Grandfield in zone 8a in ZIP code 73546, the nearest ZIP area.
How late can frost come in Grandfield?
In half of years the last 32°F night comes after March 31; in one year in ten it comes after April 18. Waiting until April 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oklahoma climateThe statewide normals and every place in the state
- Chattanooga, OK14 miles from this station, 61.4°F a year
- Altus Air Force Base, OK16 miles from this station, 63.6°F a year
- Frederick, OK19 miles from this station, 62.1°F a year
- Wichita Falls, TX23 miles from this station, 63.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made