Climate Comfort Score
88/100
Excellent
NOAA 1991–2020 normals 61°F annual avg Public-domain federal data
Sulphur, OK Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 61°F
- Avg annual temp
- 88/100
- Comfort score
- 40.7"
- Annual precip
- 211d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Sulphur
Sulphur, Oklahoma averages 61°F a year and scores 88/100 on the comfort index - excellent, milder than 92% of U.S. cities.
- 61°F
- yearly average temperature, NOAA normal
- 88/100
- comfort score, milder than 92% of U.S. cities
- 40.7"
- precipitation, annual total
- 211 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
61°F (16°C)
Avg High
73°F
Avg Low
50°F
Annual Precip
40.7"
Comfort Score
88/100
Excellent
Avg Annual Temperature
61°F
30-year mean (NOAA NCEI)
Annual Precipitation
40.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Sulphur) 88.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Sulphur area.
How Sulphur compares to every U.S. city
Sulphur's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
88 Top 8% higher than 92% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Sulphur
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Sulphur captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 52°F (11°C) | 28°F (-2°C) | 40°F (5°C) | 1.8" | 21.5 | 0.0 |
| February | 56°F (13°C) | 33°F (0°C) | 44°F (7°C) | 2.2" | 15.0 | 0.0 |
| March | 65°F (18°C) | 41°F (5°C) | 53°F (12°C) | 3.2" | 7.2 | 0.2 |
| April | 72°F (22°C) | 49°F (9°C) | 60°F (16°C) | 3.7" | 1.7 | 0.2 |
| May | 79°F (26°C) | 59°F (15°C) | 69°F (20°C) | 5.7" | 0.3 | 1.2 |
| June | 87°F (31°C) | 67°F (20°C) | 77°F (25°C) | 4.6" | 0.0 | 15.1 |
| July | 92°F (33°C) | 71°F (22°C) | 82°F (28°C) | 3.2" | 0.0 | 23.2 |
| August | 93°F (34°C) | 70°F (21°C) | 82°F (28°C) | 2.6" | 0.0 | 23.1 |
| September | 85°F (30°C) | 62°F (17°C) | 74°F (23°C) | 4.3" | 0.0 | 11.3 |
| October | 74°F (23°C) | 50°F (10°C) | 62°F (17°C) | 4.1" | 1.6 | 0.7 |
| November | 63°F (17°C) | 39°F (4°C) | 51°F (11°C) | 2.6" | 9.4 | 0.0 |
| December | 54°F (12°C) | 31°F (-1°C) | 42°F (6°C) | 2.6" | 18.7 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.8"
February 2.2"
March 3.2"
April 3.7"
May 5.7"
June 4.6"
July 3.2"
August 2.6"
September 4.3"
October 4.1"
November 2.6"
December 2.6"
Frost Dates & Growing Season
First Fall Freeze
November 1
50% probability date
Last Spring Freeze
April 4
50% probability date
Growing Season
211 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,294
Higher = more heating needed
Cooling Degree Days
1,984
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
What Sulphur's climate means for you
Sulphur runs 61°F a year - peaking in August, coldest in January.
- Gardeners get about 211 frost-free days, with the last spring freeze near April 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,294 heating and 1,984 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Sulphur, OK
Based on station USC00348570 feeding NOAA's 1991–2020 climate normals, Sulphur, Oklahoma averages 61°F a year, ranging from a mean daily high of 73°F to a mean daily low of 50°F. August is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Anyone planning to live, garden, or travel in Sulphur should weigh precipitation alongside temperature: the annual average runs 40.7 inches, predominantly as rainfall. The frost-free season averages 211 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 4 and the first fall freeze near November 1. And on the energy front, 3,294 heating degree days and 1,984 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Sulphur scores 88/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Sulphur, OK? ▼
The average annual temperature in Sulphur, Oklahoma is 61°F. The warmest month averages 93°F (34°C) and the coldest averages 28°F (-2°C).
How much rain does Sulphur get? ▼
Sulphur receives 40.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Sulphur? ▼
Sulphur has a climate comfort score of 88/100 (Excellent), milder than 92% of U.S. cities in the PlainClimate database.
When is the growing season in Sulphur? ▼
Sulphur has approximately 211 frost-free days per year, with the last spring freeze around April 4 and the first fall freeze around November 1.
How much energy does heating and cooling require in Sulphur? ▼
Sulphur has 3,294 heating degree days and 1,984 cooling degree days annually, a fairly balanced heating/cooling split. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Sulphur climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00348570 near Sulphur.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00348570. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.