Windsor, Missouri climate: Normal weather by month, frost dates and records
Windsor's normal year runs from 21°F January nights to 89°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.2°C, January lows of −6°C, July highs of 31°C.
- NOAA stationWindsor
- Station IDUSC00239032
- Location38.53°N 93.52°W
- Elevation840 ft (256 m)
- From the centerunder 1 mile
- Population2,854
On October 23, the normal high in Windsor is 66°F and the normal low 43°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Windsor.
- Jan 40° 21°
- Feb 45° 25°
- Mar 56° 33°
- Apr 67° 44°
- May 75° 55°
- Jun 84° 65°
- Jul 89° 69°
- Aug 88° 67°
- Sep 80° 59°
- Oct 69° 46°
- Nov 56° 36°
- Dec 44° 25°
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 Windsor each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 21°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 40°F | 21°F | 30.7°F | – | <1 | 28 | 9 h 50 min |
| February | 45°F | 25°F | 35.1°F | – | <1 | 22 | 10 h 40 min |
| March | 56°F | 33°F | 44.6°F | – | <1 | 16 | 11 h 50 min |
| April | 67°F | 44°F | 55.4°F | – | <1 | 4 | 13 h 10 min |
| May | 75°F | 55°F | 65.0°F | – | <1 | <1 | 14 h 10 min |
| June | 84°F | 65°F | 74.5°F | – | 3 | <1 | 14 h 50 min |
| July | 89°F | 69°F | 78.8°F | – | 11 | <1 | 14 h 40 min |
| August | 88°F | 67°F | 77.3°F | – | 12 | <1 | 13 h 40 min |
| September | 80°F | 59°F | 69.5°F | – | 2 | <1 | 12 h 30 min |
| October | 69°F | 46°F | 57.2°F | – | <1 | 3 | 11 h 20 min |
| November | 56°F | 36°F | 45.5°F | – | <1 | 14 | 10 h 10 min |
| December | 44°F | 25°F | 34.7°F | – | <1 | 25 | 9 h 30 min |
| Year (annual) | 66°F | 45°F | 55.7°F | – | 29 | 111 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 5°C | −6°C | −0.7°C |
| February | 7°C | −4°C | 1.7°C |
| March | 13°C | 1°C | 7.0°C |
| April | 19°C | 7°C | 13.0°C |
| May | 24°C | 13°C | 18.3°C |
| June | 29°C | 18°C | 23.6°C |
| July | 31°C | 21°C | 26.0°C |
| August | 31°C | 19°C | 25.2°C |
| September | 27°C | 15°C | 20.8°C |
| October | 20°C | 8°C | 14.0°C |
| November | 13°C | 2°C | 7.5°C |
| December | 7°C | −4°C | 1.5°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Cole Camp (15 miles away), gets 18 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00239032; 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 Windsor?
Normal highs sit between 65°F and 85°F in April, May, June, 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 USC00239032.
When is the last frost in Windsor?
In Windsor, the last spring frost (32°F) comes after April 7 in half of years and after April 24 in one year in ten; the first autumn frost comes before October 28 in half of years and before October 15 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 71 year in 10 after April 24; 9 in 10 after March 23
- First autumn frost, half of years before
- October 281 year in 10 before October 15; 9 in 10 before November 10
NOAA puts the median frost-free season at 202 days, and the season without a hard freeze (28°F) at 222 days.
A hard freeze (28°F) comes after March 30 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Windsor in zone 6b in ZIP code 65360, the nearest ZIP area.
Frost dates for every NOAA station in Missouri · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00239032; 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 Windsor?
In a normal year in Windsor, 29 days a year reach 90°F (2 of them 100°F or more) and 111 nights fall to 32°F or colder.
- Days at 90°F or more
- 29a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 111a normal year
- Days that stay below freezing
- 24high of 32°F or less
The highest temperature in this station's record (since 1893) is 115°F, on July 14, 1954; the lowest is −30°F, on February 13, 1905.
The wettest calendar year on that record is 1973, with 63.52 in; the snowiest season is 1973–74, with 46.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00239032; records: ACIS (NOAA Regional Climate Centers), station USC00239032. Records use complete months only; a month missing more than three days is left out.
How sunny is Windsor?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Windsor, 4.3 kWh per square metre a day. July is the sunniest month (83%) and March the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.2 |
| February | 68% | 3.0 |
| March | 68% | 3.9 |
| April | 71% | 5.0 |
| May | 73% | 5.7 |
| June | 81% | 6.6 |
| July | 83% | 6.5 |
| August | 81% | 5.7 |
| September | 82% | 4.8 |
| October | 76% | 3.5 |
| November | 73% | 2.5 |
| December | 69% | 1.9 |
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 Windsor need?
A normal year in Windsor brings 4,797 heating degree days, 11% fewer than the median U.S. place (5,373), and 1,443 cooling degree days, 59% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,180 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,062 | 0 |
| February | 839 | 0 |
| March | 634 | 3 |
| April | 311 | 24 |
| May | 100 | 100 |
| June | 7 | 292 |
| July | 0 | 428 |
| August | 2 | 381 |
| September | 48 | 181 |
| October | 270 | 30 |
| November | 588 | 3 |
| December | 938 | 0 |
| Year (annual) | 4,797 | 1,443 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00239032. 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 Windsor's climate compare?
Windsor is warmer than 78 of the other 133 places with their own NOAA record in Missouri. Across the 7,247 U.S. stations with normals, its annual mean of 55.7°F is warmer than 63%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Windsor share this climate record?
3 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.
- Green Ridge, MO599 people · 9 mi NE
- Leeton, MO549 people · 10 mi W
- Calhoun, MO405 people · 7 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 Windsor's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Windsor. This page uses Windsor; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Windsor station USC00239034 | in town | 877 ft | 54.0°F | 19°F | 87°F | 44.4 | – | April 13 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Windsor's climate
What is the coldest month in Windsor?
January, with a normal high of 40°F and a normal low of 21°F. The warmest is July (89°F by day, 69°F at night).
Does it snow in Windsor?
Yes. NOAA publishes no 1991-2020 snowfall normal for Windsor's NOAA station; the nearest record that keeps one, Cole Camp (15 miles away), records 18 inches of snow in a normal year.
What plant hardiness zone is Windsor in?
The USDA's 2023 map puts Windsor in zone 6b in ZIP code 65360, the nearest ZIP area.
How late can frost come in Windsor?
In half of years the last 32°F night comes after April 7; in one year in ten it comes after April 24. Waiting until April 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Cole Camp, MO15 miles from this station, 54.1°F a year
- Clinton, MO16 miles from this station, 55.3°F a year
- Truman Dam & Reservoir, MO20 miles from this station, 56.5°F a year
- Sedalia, MO22 miles from this station, 54.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made