Mexico, Missouri climate: Normal weather by month, frost dates and records
Mexico's normal year runs from 19°F January nights to 88°F July afternoons, with 43.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.3°C, January lows of −7°C, July highs of 31°C, 1,105 mm of precipitation a year.
- NOAA stationMexico
- Station IDUSC00235541
- Location39.18°N 91.89°W
- Elevation802 ft (244 m)
- Population11,482
On October 23, the normal high in Mexico is 65°F and the normal low 42°F, and the chance of measurable rain or snow is 27%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Mexico.
- Jan 38° 19°
- Feb 43° 23°
- Mar 54° 32°
- Apr 66° 43°
- May 75° 54°
- Jun 84° 63°
- Jul 88° 67°
- Aug 87° 65°
- Sep 79° 56°
- Oct 68° 45°
- Nov 54° 34°
- Dec 42° 24°
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 Mexico each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 19°F. The most precipitation falls in June (5.23 in), the least in January (2.03 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 19°F | 28.4°F | 2.03 | 8 | <1 | 28 | 9 h 40 min |
| February | 43°F | 23°F | 32.8°F | 2.31 | 7 | <1 | 23 | 10 h 40 min |
| March | 54°F | 32°F | 43.0°F | 3.17 | 10 | <1 | 17 | 11 h 50 min |
| April | 66°F | 43°F | 54.4°F | 4.68 | 11 | <1 | 3 | 13 h 10 min |
| May | 75°F | 54°F | 64.3°F | 5.07 | 12 | 1 | <1 | 14 h 20 min |
| June | 84°F | 63°F | 73.4°F | 5.23 | 10 | 7 | <1 | 14 h 50 min |
| July | 88°F | 67°F | 77.6°F | 4.43 | 9 | 13 | <1 | 14 h 40 min |
| August | 87°F | 65°F | 75.8°F | 3.90 | 7 | 13 | <1 | 13 h 40 min |
| September | 79°F | 56°F | 67.9°F | 4.86 | 7 | 4 | <1 | 12 h 30 min |
| October | 68°F | 45°F | 56.0°F | 2.81 | 8 | <1 | 3 | 11 h 10 min |
| November | 54°F | 34°F | 44.0°F | 2.75 | 8 | <1 | 14 | 10 h |
| December | 42°F | 24°F | 33.0°F | 2.28 | 8 | <1 | 25 | 9 h 30 min |
| Year (annual) | 65°F | 44°F | 54.2°F | 43.52 | 104 | 38 | 113 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −7°C | −2.0°C | 52 mm |
| February | 6°C | −5°C | 0.4°C | 59 mm |
| March | 12°C | 0°C | 6.1°C | 81 mm |
| April | 19°C | 6°C | 12.4°C | 119 mm |
| May | 24°C | 12°C | 17.9°C | 129 mm |
| June | 29°C | 17°C | 23.0°C | 133 mm |
| July | 31°C | 20°C | 25.3°C | 113 mm |
| August | 30°C | 18°C | 24.3°C | 99 mm |
| September | 26°C | 14°C | 19.9°C | 123 mm |
| October | 20°C | 7°C | 13.3°C | 71 mm |
| November | 12°C | 1°C | 6.7°C | 70 mm |
| December | 5°C | −4°C | 0.6°C | 58 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Fulton (23 miles away), gets 19 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00235541; 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 Mexico?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, September 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 USC00235541.
When is the last frost in Mexico?
In Mexico, the last spring frost (32°F) comes after April 11 in half of years and after April 26 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 13 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 111 year in 10 after April 26; 9 in 10 after March 27
- First autumn frost, half of years before
- October 251 year in 10 before October 13; 9 in 10 before November 5
NOAA puts the median frost-free season at 197 days, and the season without a hard freeze (28°F) at 218 days.
A hard freeze (28°F) comes after April 1 in half of springs and before November 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mexico in zone 6b in ZIP code 65265, 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 USC00235541; 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 Mexico?
In a normal year in Mexico, 38 days a year reach 90°F (3 of them 100°F or more), 113 nights fall to 32°F or colder and 104 days bring measurable precipitation.
- Days at 90°F or more
- 38a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 113a normal year
- Days that stay below freezing
- 26high of 32°F or less
- Days with 0.01 inch of precipitation
- 104a normal year
The highest temperature in this station's record (since 1893) is 116°F, on July 20, 1934; the lowest is −25°F, on February 12, 1899.
The wettest calendar year on that record is 1969, with 65.32 in; the snowiest season is 1977–78, with 53.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00235541; records: ACIS (NOAA Regional Climate Centers), station USC00235541. Records use complete months only; a month missing more than three days is left out.
How sunny is Mexico?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Mexico, 4.2 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 2.0 |
| February | 68% | 2.9 |
| March | 68% | 3.8 |
| April | 71% | 5.0 |
| May | 73% | 5.7 |
| June | 79% | 6.4 |
| July | 82% | 6.4 |
| August | 81% | 5.6 |
| September | 82% | 4.8 |
| October | 75% | 3.3 |
| November | 72% | 2.3 |
| December | 65% | 1.8 |
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 Mexico need?
A normal year in Mexico brings 5,168 heating degree days, 4% fewer than the median U.S. place (5,373), and 1,275 cooling degree days, 40% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,907 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,133 | 0 |
| February | 901 | 0 |
| March | 686 | 4 |
| April | 339 | 21 |
| May | 113 | 92 |
| June | 11 | 261 |
| July | 0 | 391 |
| August | 3 | 337 |
| September | 58 | 145 |
| October | 300 | 23 |
| November | 631 | 1 |
| December | 992 | 0 |
| Year (annual) | 5,168 | 1,275 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00235541. 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 Mexico's climate compare?
Mexico is warmer than 45 of the other 133 places with their own NOAA record in Missouri, and wetter than 62. Across the 7,247 U.S. stations with normals, its annual mean of 54.2°F is warmer than 58%.
In the Köppen classification computed from these normals, Mexico is Dfa: continental, 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 Mexico share this climate record?
7 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.
- Centralia, MO4,807 people · 13 mi W
- Hallsville, MO1,766 people · 19 mi W
- Auxvasse, MO1,023 people · 11 mi S
- Martinsburg, MO257 people · 14 mi E
- Benton City, MO103 people · 7 mi SE
- Rush Hill, MO98 people · 9 mi E
- Vandiver, MO63 people · 2 mi SE
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 Mexico's climate
What is the coldest month in Mexico?
January, with a normal high of 38°F and a normal low of 19°F. The warmest is July (88°F by day, 67°F at night).
Does it snow in Mexico?
Yes. NOAA publishes no 1991-2020 snowfall normal for Mexico's NOAA station; the nearest record that keeps one, Fulton (23 miles away), records 19 inches of snow in a normal year.
What is the rainiest month in Mexico?
June, with 5.23 in of precipitation in a normal year; the driest is January with 2.03 in.
What plant hardiness zone is Mexico in?
The USDA's 2023 map puts Mexico in zone 6b in ZIP code 65265, the nearest ZIP area.
How late can frost come in Mexico?
In half of years the last 32°F night comes after April 11; in one year in ten it comes after April 26. Waiting until April 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Fulton, MO23 miles from this station, 53.4°F a year
- Vandalia, MO23 miles from this station, 53.1°F a year
- Columbia, MO30 miles from this station, 56.0°F a year
- Monroe City, MO33 miles from this station, 52.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made