Norman, Oklahoma climate: Normal weather by month, frost dates and records
Norman's normal year runs from 28°F January nights to 93°F July afternoons, with 37.6 inches of precipitation and 4 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.9°C, January lows of −2°C, July highs of 34°C, 956 mm of precipitation a year.
- NOAA stationNorman (3 mi SSE)
- Station IDUSC00346386
- Location35.18°N 97.44°W
- Elevation1,128 ft (344 m)
- Population131,010
On October 22, the normal high in Norman is 72°F and the normal low 48°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Norman.
- Jan 50° 28°
- Feb 54° 31°
- Mar 63° 40°
- Apr 71° 48°
- May 79° 58°
- Jun 87° 67°
- Jul 93° 71°
- Aug 92° 70°
- Sep 84° 62°
- Oct 74° 50°
- Nov 62° 39°
- Dec 52° 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 Norman each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 28°F. The most precipitation falls in May (5.14 in), the least in January (1.37 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 50°F | 28°F | 38.8°F | 1.37 | 1.2 | 5 | <1 | 22 | 10 h |
| February | 54°F | 31°F | 42.9°F | 1.60 | 1.2 | 6 | <1 | 17 | 10 h 50 min |
| March | 63°F | 40°F | 51.5°F | 2.80 | 0.2 | 7 | <1 | 7 | 11 h 50 min |
| April | 71°F | 48°F | 59.8°F | 3.48 | 0.0 | 8 | 1 | 1 | 13 h |
| May | 79°F | 58°F | 68.6°F | 5.14 | 0.0 | 10 | 3 | <1 | 14 h |
| June | 87°F | 67°F | 77.3°F | 4.79 | 0.0 | 9 | 12 | <1 | 14 h 30 min |
| July | 93°F | 71°F | 81.8°F | 3.71 | 0.0 | 6 | 22 | <1 | 14 h 20 min |
| August | 92°F | 70°F | 81.2°F | 3.61 | 0.0 | 7 | 22 | <1 | 13 h 30 min |
| September | 84°F | 62°F | 73.2°F | 3.68 | 0.0 | 7 | 9 | <1 | 12 h 30 min |
| October | 74°F | 50°F | 62.0°F | 3.43 | 0.0 | 7 | 1 | 1 | 11 h 20 min |
| November | 62°F | 39°F | 50.3°F | 2.04 | 0.5 | 6 | <1 | 8 | 10 h 20 min |
| December | 52°F | 31°F | 41.1°F | 2.00 | 1.0 | 6 | <1 | 20 | 9 h 50 min |
| Year (annual) | 72°F | 50°F | 60.7°F | 37.65 | 4.1 | 85 | 69 | 77 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | −2°C | 3.8°C | 35 mm | 3 cm |
| February | 12°C | 0°C | 6.1°C | 41 mm | 3 cm |
| March | 17°C | 4°C | 10.8°C | 71 mm | 1 cm |
| April | 22°C | 9°C | 15.4°C | 88 mm | 0 cm |
| May | 26°C | 15°C | 20.3°C | 131 mm | 0 cm |
| June | 31°C | 20°C | 25.2°C | 122 mm | 0 cm |
| July | 34°C | 22°C | 27.7°C | 94 mm | 0 cm |
| August | 33°C | 21°C | 27.3°C | 92 mm | 0 cm |
| September | 29°C | 17°C | 22.9°C | 93 mm | 0 cm |
| October | 23°C | 10°C | 16.7°C | 87 mm | 0 cm |
| November | 17°C | 4°C | 10.2°C | 52 mm | 1 cm |
| December | 11°C | −1°C | 5.1°C | 51 mm | 3 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00346386; 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 Norman?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October has the fewest days with rain (7).
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 USC00346386.
When is the last frost in Norman?
In Norman, the last spring frost (32°F) comes after April 3 in half of years and after April 18 in one year in ten; the first autumn frost comes before November 3 in half of years and before October 21 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 31 year in 10 after April 18; 9 in 10 after March 19
- First autumn frost, half of years before
- November 31 year in 10 before October 21; 9 in 10 before November 17
NOAA puts the median frost-free season at 212 days, and the season without a hard freeze (28°F) at 232 days.
A hard freeze (28°F) comes after March 23 in half of springs and before November 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Norman in zone 7b across its 7 ZIP code areas (7b in 73026, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Norman's NOAA station is in zone 7b: the coldest night of a typical year reaches 7°F (20 complete years).
Frost dates for every NOAA station in Oklahoma · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00346386; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Norman ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Norman's 7 ZIP code areas are all in zone 7b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Norman?
In a normal year in Norman, 69 days a year reach 90°F (10 of them 100°F or more), 77 nights fall to 32°F or colder and 85 days bring measurable precipitation.
- Days at 90°F or more
- 69a normal year
- Days at 100°F or more
- 10a normal year
- Nights at 32°F or colder
- 77a normal year
- Days that stay below freezing
- 7high of 32°F or less
- Days with 0.01 inch of precipitation
- 85a normal year
- Days with 1 inch of snow or more
- 2a normal year
The highest temperature in this station's record (since 1894) is 116°F, on August 10, 1936; the lowest is −17°F, on February 13, 1899.
The wettest calendar year on that record is 2015, with 62.62 in; the snowiest season is 1977–78, with 19.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00346386; records: ACIS (NOAA Regional Climate Centers), station USC00346386. Records use complete months only; a month missing more than three days is left out.
How sunny is Norman?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Norman, 4.7 kWh per square metre a day. July is the sunniest month (88%) and February the cloudiest (73%). Among the 459 U.S. places of 50,000 or more, that ranks tied 125th (with 50 others) in sunshine.
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.8 |
| February | 73% | 3.4 |
| March | 74% | 4.5 |
| April | 76% | 5.5 |
| May | 75% | 6.0 |
| June | 85% | 6.9 |
| July | 88% | 6.9 |
| August | 87% | 6.2 |
| September | 84% | 5.1 |
| October | 80% | 4.0 |
| November | 79% | 3.0 |
| December | 74% | 2.4 |
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 Norman need?
A normal year in Norman brings 3,479 heating degree days, 35% fewer than the median U.S. place (5,373), and 1,945 cooling degree days, 2.1 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 5,109 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 812 | 0 |
| February | 621 | 1 |
| March | 428 | 9 |
| April | 198 | 42 |
| May | 48 | 160 |
| June | 1 | 368 |
| July | 0 | 522 |
| August | 0 | 501 |
| September | 18 | 264 |
| October | 164 | 71 |
| November | 447 | 6 |
| December | 741 | 0 |
| Year (annual) | 3,479 | 1,945 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00346386. 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 Norman been warmer than normal lately?
2025 averaged 61.9°F, 1.2°F above the 1991-2020 normal of 60.7°F. 2 of the 2 complete years since 2024 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2024 | 63.3°F | +2.6°F | 38.74 | 0.3 |
| 2025 | 61.9°F | +1.2°F | 41.56 | 6.8 |
Source: observed years: ACIS, station USC00346386. A year counts only with all twelve months complete.
How does Norman's climate compare?
Norman is warmer than 78 of the other 133 places with their own NOAA record in Oklahoma, and wetter than 53. Across the 7,247 U.S. stations with normals, its annual mean of 60.7°F is warmer than 76%.
In the Köppen classification computed from these normals, Norman 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.
Which places near Norman share this climate record?
2 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.
- Noble, OK7,779 people · 5 mi SE
- Goldsby, OK3,516 people · 5 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Norman's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Norman. This page uses Norman (3 mi SSE); the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Norman 2 mi NW Mesonet USC00346382 | 4 mi N | 1,181 ft | 61.2°F | 29°F | 93°F | – | – | March 31 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Norman's climate
What is the coldest month in Norman?
January, with a normal high of 50°F and a normal low of 28°F. The warmest is July (93°F by day, 71°F at night).
Does it snow in Norman?
Yes: 4 inches in a normal year, falling on 4 days with 0.1 inch or more, the most in January (1.2 inches).
What is the rainiest month in Norman?
May, with 5.14 in of precipitation in a normal year; the driest is January with 1.37 in.
What plant hardiness zone is Norman in?
The USDA's 2023 map puts Norman in zone 7b across its 7 ZIP code areas (7b in 73026, the largest). By the same method at Norman's NOAA station, the coldest night of a typical year reaches 7°F (20 years, 1991-2020): zone 7b.
How late can frost come in Norman?
In half of years the last 32°F night comes after April 3; 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
- Norman in OctoberThis month day by day, its records and recent years
- Oklahoma climateThe statewide normals and every place in the state
- Purcell, OK14 miles from this station, 61.4°F a year
- Blanchard, OK14 miles from this station, 61.4°F a year
- Washington, OK14 miles from this station, 61.1°F a year
- Oklahoma City, OK17 miles from this station, 60.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made