Upper Spavinaw Port, Oklahoma climate: Climate normals at a NOAA weather station
Upper Spavinaw Port's normal year runs from 23°F January nights to 91°F July afternoons, with 49.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.3°C, January lows of −5°C, July highs of 33°C, 1,257 mm of precipitation a year.
- NOAA stationUpper Spavinaw Port
- Station IDUSC00349101
- Location36.35°N 94.82°W
- Elevation795 ft (242 m)
On October 23, the normal high in Upper Spavinaw Port is 71°F and the normal low 41°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Upper Spavinaw Port.
- Jan 49° 23°
- Feb 54° 26°
- Mar 63° 34°
- Apr 72° 43°
- May 79° 53°
- Jun 86° 62°
- Jul 91° 67°
- Aug 91° 65°
- Sep 83° 56°
- Oct 73° 43°
- Nov 62° 34°
- Dec 52° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Upper Spavinaw Port each month?
July is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 23°F. The most precipitation falls in May (6.22 in), the least in February (2.50 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 49°F | 23°F | 35.8°F | 3.23 | – | <1 | 26 | 10 h |
| February | 54°F | 26°F | 40.2°F | 2.50 | – | <1 | 21 | 10 h 50 min |
| March | 63°F | 34°F | 48.3°F | 4.11 | – | <1 | 13 | 11 h 50 min |
| April | 72°F | 43°F | 57.5°F | 4.92 | – | <1 | 4 | 13 h |
| May | 79°F | 53°F | 65.7°F | 6.22 | – | 1 | <1 | 14 h |
| June | 86°F | 62°F | 74.2°F | 5.04 | – | 9 | <1 | 14 h 40 min |
| July | 91°F | 67°F | 79.0°F | 4.14 | – | 20 | <1 | 14 h 30 min |
| August | 91°F | 65°F | 78.1°F | 3.76 | – | 18 | <1 | 13 h 40 min |
| September | 83°F | 56°F | 69.8°F | 4.47 | – | 8 | <1 | 12 h 30 min |
| October | 73°F | 43°F | 58.1°F | 4.18 | – | <1 | 3 | 11 h 20 min |
| November | 62°F | 34°F | 47.9°F | 3.88 | – | <1 | 13 | 10 h 20 min |
| December | 52°F | 26°F | 39.0°F | 3.03 | – | <1 | 23 | 9 h 40 min |
| Year (annual) | 71°F | 44°F | 57.8°F | 49.48 | – | 57 | 102 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | −5°C | 2.1°C | 82 mm |
| February | 12°C | −3°C | 4.6°C | 64 mm |
| March | 17°C | 1°C | 9.1°C | 104 mm |
| April | 22°C | 6°C | 14.2°C | 125 mm |
| May | 26°C | 12°C | 18.7°C | 158 mm |
| June | 30°C | 17°C | 23.4°C | 128 mm |
| July | 33°C | 19°C | 26.1°C | 105 mm |
| August | 33°C | 19°C | 25.6°C | 96 mm |
| September | 28°C | 14°C | 21.0°C | 114 mm |
| October | 23°C | 6°C | 14.5°C | 106 mm |
| November | 17°C | 1°C | 8.8°C | 99 mm |
| December | 11°C | −3°C | 3.9°C | 77 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Spavinaw (13 miles away), gets 6 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00349101; 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.
Which months are mildest at Upper Spavinaw Port?
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 USC00349101.
When is the last frost at Upper Spavinaw Port?
In Upper Spavinaw Port, the last spring frost (32°F) comes after April 16 in half of years and after May 1 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 6 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 161 year in 10 after May 1; 9 in 10 after March 31
- First autumn frost, half of years before
- October 201 year in 10 before October 6; 9 in 10 before November 1
NOAA puts the median frost-free season at 187 days, and the season without a hard freeze (28°F) at 208 days.
A hard freeze (28°F) comes after April 3 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Upper Spavinaw Port in zone 7a in ZIP code 74346, 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 USC00349101; 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 at Upper Spavinaw Port?
In a normal year in Upper Spavinaw Port, 57 days a year reach 90°F (6 of them 100°F or more) and 102 nights fall to 32°F or colder.
- Days at 90°F or more
- 57a normal year
- Days at 100°F or more
- 6a normal year
- Nights at 32°F or colder
- 102a normal year
- Days that stay below freezing
- 7high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00349101.
How sunny is it at Upper Spavinaw Port?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds at Upper Spavinaw Port, 4.4 kWh per square metre a day. July is the sunniest month (84%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.5 |
| February | 67% | 3.1 |
| March | 69% | 4.1 |
| April | 72% | 5.2 |
| May | 73% | 5.8 |
| June | 82% | 6.7 |
| July | 84% | 6.5 |
| August | 82% | 5.8 |
| September | 82% | 5.0 |
| October | 77% | 3.7 |
| November | 75% | 2.7 |
| December | 69% | 2.1 |
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 many heating and cooling degree days does Upper Spavinaw Port record?
A normal year at Upper Spavinaw Port brings 4,060 heating degree days, 24% fewer than the median U.S. place (5,373), and 1,463 cooling degree days, 61% 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 4,339 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 907 | 1 |
| February | 695 | 0 |
| March | 522 | 6 |
| April | 252 | 27 |
| May | 82 | 102 |
| June | 3 | 277 |
| July | 0 | 433 |
| August | 1 | 405 |
| September | 35 | 179 |
| October | 243 | 31 |
| November | 515 | 3 |
| December | 806 | 0 |
| Year (annual) | 4,060 | 1,463 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00349101. 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.
Have recent years at Upper Spavinaw Port been warmer than normal?
2025 averaged 58.9°F, 1.1°F above the 1991-2020 normal of 57.8°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.7°F | +0.9°F | 47.39 |
| 2023 | 59.5°F | +1.7°F | 53.31 |
| 2024 | 60.9°F | +3.1°F | 45.64 |
| 2025 | 58.9°F | +1.1°F | 54.98 |
Source: observed years: ACIS, station USC00349101. A year counts only with all twelve months complete.
How does Upper Spavinaw Port's climate compare?
Upper Spavinaw Port is warmer than 13 of the 134 places with their own NOAA record in Oklahoma, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 57.8°F is warmer than 69%.
In the Köppen classification computed from these normals, Upper Spavinaw Port 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 Upper Spavinaw Port share this climate record?
12 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.
- Jay, OK2,474 people · 6 mi N
- Zena, OK272 people · 11 mi N
- New Eucha, OK248 people · 3 mi NW
- Dennis, OK206 people · 14 mi N
- Cloud Creek, OK195 people · 5 mi SE
- Drowning Creek, OK135 people · 10 mi NW
- Bull Hollow, OK119 people · 5 mi SW
- Maysville, AR118 people · 14 mi E
- Oak Hill-Piney, OK101 people · 6 mi E
- Brush Creek, OK100 people · 5 mi NE
- Old Eucha, OK29 people · 6 mi W
- Tagg Flats, OK0 people · 4 mi W
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 Upper Spavinaw Port's climate
What is the coldest month at Upper Spavinaw Port?
January, with a normal high of 49°F and a normal low of 23°F. The warmest is July (91°F by day, 67°F at night).
Does it snow at Upper Spavinaw Port?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Spavinaw (13 miles away), records 6 inches of snow in a normal year.
What is the rainiest month at Upper Spavinaw Port?
May, with 6.22 in of precipitation in a normal year; the driest is February with 2.50 in.
What plant hardiness zone is Upper Spavinaw Port in?
The USDA's 2023 map puts Upper Spavinaw Port in zone 7a in ZIP code 74346, the nearest ZIP area.
How late can frost come at Upper Spavinaw Port?
In half of years the last 32°F night comes after April 16; in one year in ten it comes after May 1. Waiting until May 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oklahoma climateThe statewide normals and every place in the state
- Kansas, OK10 miles from this station, 60.4°F a year
- Spavinaw, OK14 miles from this station, 59.8°F a year
- Gravette, AR22 miles from this station, 60.5°F a year
- Pryor, OK28 miles from this station, 59.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made