Grant City, Missouri climate: Normal weather by month, frost dates and records
Grant City's normal year runs from 13°F January nights to 85°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.2°C, January lows of −10°C, July highs of 30°C.
- NOAA stationGrant City
- Station IDUSC00233369
- Location40.49°N 94.41°W
- Elevation1,130 ft (344 m)
- From the centerunder 1 mile
- Population780
On October 23, the normal high in Grant City is 61°F and the normal low 39°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grant City.
- Jan 33° 13°
- Feb 39° 17°
- Mar 51° 27°
- Apr 62° 38°
- May 72° 51°
- Jun 80° 60°
- Jul 85° 65°
- Aug 84° 63°
- Sep 77° 53°
- Oct 64° 41°
- Nov 50° 28°
- Dec 37° 18°
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 Grant City each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 13°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 33°F | 13°F | 23.1°F | – | <1 | 30 | 9 h 30 min |
| February | 39°F | 17°F | 27.9°F | – | <1 | 24 | 10 h 40 min |
| March | 51°F | 27°F | 39.2°F | – | <1 | 21 | 11 h 50 min |
| April | 62°F | 38°F | 50.2°F | – | <1 | 7 | 13 h 10 min |
| May | 72°F | 51°F | 61.6°F | – | <1 | 1 | 14 h 20 min |
| June | 80°F | 60°F | 70.3°F | – | 2 | <1 | 15 h |
| July | 85°F | 65°F | 74.8°F | – | 8 | <1 | 14 h 50 min |
| August | 84°F | 63°F | 73.1°F | – | 8 | <1 | 13 h 50 min |
| September | 77°F | 53°F | 65.0°F | – | 2 | <1 | 12 h 30 min |
| October | 64°F | 41°F | 52.8°F | – | <1 | 7 | 11 h 10 min |
| November | 50°F | 28°F | 38.9°F | – | <1 | 20 | 10 h |
| December | 37°F | 18°F | 27.5°F | – | <1 | 28 | 9 h 20 min |
| Year (annual) | 61°F | 40°F | 50.4°F | – | 20 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 1°C | −10°C | −4.9°C |
| February | 4°C | −8°C | −2.3°C |
| March | 11°C | −3°C | 4.0°C |
| April | 17°C | 3°C | 10.1°C |
| May | 22°C | 11°C | 16.4°C |
| June | 27°C | 16°C | 21.3°C |
| July | 30°C | 18°C | 23.8°C |
| August | 29°C | 17°C | 22.8°C |
| September | 25°C | 12°C | 18.3°C |
| October | 18°C | 5°C | 11.6°C |
| November | 10°C | −2°C | 3.8°C |
| December | 3°C | −8°C | −2.5°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Mount Ayr (18 miles away), gets 21 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00233369; 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 Grant City?
Normal highs sit between 65°F and 85°F in May, June, August and September.
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 USC00233369.
When is the last frost in Grant City?
In Grant City, the last spring frost (32°F) comes after April 24 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 29 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 241 year in 10 after May 7; 9 in 10 after April 11
- First autumn frost, half of years before
- October 141 year in 10 before September 29; 9 in 10 before October 26
NOAA puts the median frost-free season at 172 days, and the season without a hard freeze (28°F) at 191 days.
A hard freeze (28°F) comes after April 14 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grant City in zone 5b in ZIP code 64456, 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 USC00233369; 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 Grant City?
In a normal year in Grant City, 20 days a year reach 90°F (1 of them 100°F or more) and 138 nights fall to 32°F or colder.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 38high of 32°F or less
The highest temperature in this station's record (since 1902) is 112°F, on July 5, 1911; the lowest is −29°F, on January 12, 1912.
The wettest calendar year on that record is 1915, with 47.41 in; the snowiest season is 1959–60, with 55.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00233369; records: ACIS (NOAA Regional Climate Centers), station USC00233369. Records use complete months only; a month missing more than three days is left out.
How sunny is Grant City?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Grant City, 4.2 kWh per square metre a day. July is the sunniest month (82%) and March the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.1 |
| February | 73% | 3.0 |
| March | 70% | 3.9 |
| April | 71% | 5.0 |
| May | 73% | 5.8 |
| June | 79% | 6.4 |
| July | 82% | 6.5 |
| August | 81% | 5.7 |
| September | 81% | 4.7 |
| October | 75% | 3.3 |
| November | 74% | 2.3 |
| December | 70% | 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 Grant City need?
A normal year in Grant City brings 6,201 heating degree days, 15% more than the median U.S. place (5,373), and 912 cooling degree days, 0% 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 3,269 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,299 | 0 |
| February | 1,037 | 0 |
| March | 799 | 0 |
| April | 447 | 4 |
| May | 162 | 56 |
| June | 20 | 179 |
| July | 1 | 305 |
| August | 6 | 257 |
| September | 98 | 96 |
| October | 391 | 14 |
| November | 782 | 0 |
| December | 1,161 | 0 |
| Year (annual) | 6,201 | 912 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00233369. 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 Grant City's climate compare?
Grant City is warmer than 1 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 50.4°F is warmer than 42%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Grant City share this climate record?
10 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.
- Clearfield, IA277 people · 22 mi N
- Blockton, IA123 people · 10 mi N
- Redding, IA64 people · 8 mi N
- Worth, MO60 people · 6 mi S
- Benton, IA40 people · 15 mi N
- Denver, MO31 people · 8 mi SE
- Maloy, IA26 people · 13 mi N
- Delphos, IA22 people · 13 mi N
- Irena, MO13 people · 4 mi N
- Athelstan, IA0 people · 9 mi NW
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 Grant City's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Grant City. This page uses Grant City; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Grant City (5 mi WSW) USC00233375 | 5 mi W | 1,089 ft | 51.0°F | 14°F | 86°F | 38.3 | – | April 20 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Grant City's climate
What is the coldest month in Grant City?
January, with a normal high of 33°F and a normal low of 13°F. The warmest is July (85°F by day, 65°F at night).
Does it snow in Grant City?
Yes. NOAA publishes no 1991-2020 snowfall normal for Grant City's NOAA station; the nearest record that keeps one, Mount Ayr (18 miles away), records 21 inches of snow in a normal year.
What plant hardiness zone is Grant City in?
The USDA's 2023 map puts Grant City in zone 5b in ZIP code 64456, the nearest ZIP area.
How late can frost come in Grant City?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Albany, MO17 miles from this station, 52.3°F a year
- Mount Ayr, IA17 miles from this station, 49.6°F a year
- Bedford, IA21 miles from this station, 50.3°F a year
- Conception, MO22 miles from this station, 51.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made