Green City, Missouri climate: Normal weather by month, frost dates and records
Green City's normal year runs from 13°F January nights to 85°F July afternoons, with 40.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.9°C, January lows of −11°C, July highs of 29°C, 1,035 mm of precipitation a year.
- NOAA stationGreen City (5 mi N)
- Station IDUSC00233416
- Location40.35°N 92.95°W
- Elevation1,035 ft (316 m)
- From the center6 miles
- Population570
On October 23, the normal high in Green City is 60°F and the normal low 37°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Green City.
- Jan 32° 13°
- Feb 37° 17°
- Mar 50° 28°
- Apr 62° 38°
- May 71° 49°
- Jun 81° 59°
- Jul 85° 63°
- Aug 84° 61°
- Sep 77° 52°
- Oct 64° 40°
- Nov 50° 29°
- Dec 37° 19°
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 Green City each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (5.57 in), the least in January (1.34 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 13°F | 22.4°F | 1.34 | – | <1 | 30 | 9 h 40 min |
| February | 37°F | 17°F | 27.1°F | 1.70 | – | <1 | 26 | 10 h 40 min |
| March | 50°F | 28°F | 38.8°F | 2.56 | – | <1 | 20 | 11 h 50 min |
| April | 62°F | 38°F | 50.0°F | 3.87 | – | <1 | 9 | 13 h 10 min |
| May | 71°F | 49°F | 60.2°F | 5.57 | – | 1 | 1 | 14 h 20 min |
| June | 81°F | 59°F | 70.0°F | 5.25 | – | 5 | <1 | 15 h |
| July | 85°F | 63°F | 74.0°F | 4.51 | – | 10 | <1 | 14 h 50 min |
| August | 84°F | 61°F | 72.1°F | 4.75 | – | 7 | <1 | 13 h 50 min |
| September | 77°F | 52°F | 64.4°F | 4.21 | – | 3 | <1 | 12 h 30 min |
| October | 64°F | 40°F | 52.0°F | 3.04 | – | <1 | 7 | 11 h 10 min |
| November | 50°F | 29°F | 39.0°F | 2.25 | – | <1 | 19 | 10 h |
| December | 37°F | 19°F | 27.9°F | 1.69 | – | <1 | 28 | 9 h 20 min |
| Year (annual) | 61°F | 39°F | 49.8°F | 40.74 | – | 25 | 139 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −11°C | −5.3°C | 34 mm |
| February | 3°C | −8°C | −2.7°C | 43 mm |
| March | 10°C | −2°C | 3.8°C | 65 mm |
| April | 17°C | 3°C | 10.0°C | 98 mm |
| May | 22°C | 10°C | 15.7°C | 141 mm |
| June | 27°C | 15°C | 21.1°C | 133 mm |
| July | 29°C | 17°C | 23.3°C | 115 mm |
| August | 29°C | 16°C | 22.3°C | 121 mm |
| September | 25°C | 11°C | 18.0°C | 107 mm |
| October | 18°C | 5°C | 11.1°C | 77 mm |
| November | 10°C | −2°C | 3.9°C | 57 mm |
| December | 3°C | −7°C | −2.3°C | 43 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Unionville (9 miles away), gets 29 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00233416; 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 Green City?
Normal highs sit between 65°F and 85°F in May, June, July, 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 USC00233416.
When is the last frost in Green City?
In Green City, the last spring frost (32°F) comes after April 26 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 30 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 261 year in 10 after May 12; 9 in 10 after April 11
- First autumn frost, half of years before
- October 141 year in 10 before September 30; 9 in 10 before October 27
NOAA puts the median frost-free season at 169 days, and the season without a hard freeze (28°F) at 189 days.
A hard freeze (28°F) comes after April 14 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Green City in zone 5b in ZIP code 63545, 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 USC00233416; 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 Green City?
In a normal year in Green City, 25 days a year reach 90°F (1 of them 100°F or more) and 139 nights fall to 32°F or colder.
- Days at 90°F or more
- 25a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 139a normal year
- Days that stay below freezing
- 45high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00233416.
How sunny is Green City?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Green City, 4.1 kWh per square metre a day. September is the sunniest month (82%) and January the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.9 |
| February | 69% | 2.9 |
| March | 68% | 3.8 |
| April | 70% | 4.9 |
| May | 72% | 5.6 |
| June | 78% | 6.3 |
| July | 82% | 6.4 |
| August | 80% | 5.5 |
| September | 82% | 4.7 |
| October | 73% | 3.2 |
| November | 72% | 2.2 |
| December | 66% | 1.7 |
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 Green City need?
A normal year in Green City brings 6,341 heating degree days, 18% more than the median U.S. place (5,373), and 846 cooling degree days, 7% fewer 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 3,140 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,319 | 0 |
| February | 1,061 | 0 |
| March | 812 | 2 |
| April | 456 | 6 |
| May | 197 | 48 |
| June | 22 | 171 |
| July | 5 | 286 |
| August | 10 | 230 |
| September | 110 | 91 |
| October | 417 | 13 |
| November | 780 | 0 |
| December | 1,152 | 0 |
| Year (annual) | 6,341 | 846 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00233416. 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.
Has Green City been warmer than normal lately?
2022 averaged 49.1°F, 0.7°F below the 1991-2020 normal of 49.8°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.2°F | +1.4°F | 40.19 |
| 2022 | 49.1°F | −0.7°F | 34.01 |
Source: observed years: ACIS, station USC00233416. A year counts only with all twelve months complete.
How does Green City's climate compare?
Green City is warmer than 0 of the other 133 places with their own NOAA record in Missouri, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 49.8°F is warmer than 39%.
In the Köppen classification computed from these normals, Green City 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 Green City share this climate record?
5 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.
- Milan, MO1,749 people · 14 mi SW
- Green Castle, MO209 people · 7 mi SE
- Connelsville, MO88 people · 14 mi E
- Worthington, MO58 people · 14 mi E
- Pollock, MO44 people · 7 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 Green City's climate
What is the coldest month in Green City?
January, with a normal high of 32°F and a normal low of 13°F. The warmest is July (85°F by day, 63°F at night).
Does it snow in Green City?
Yes. NOAA publishes no 1991-2020 snowfall normal for Green City's NOAA station; the nearest record that keeps one, Unionville (9 miles away), records 29 inches of snow in a normal year.
What is the rainiest month in Green City?
May, with 5.57 in of precipitation in a normal year; the driest is January with 1.34 in.
What plant hardiness zone is Green City in?
The USDA's 2023 map puts Green City in zone 5b in ZIP code 63545, the nearest ZIP area.
How late can frost come in Green City?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Unionville, MO9 miles from this station, 50.9°F a year
- Centerville, IA27 miles from this station, 49.9°F a year
- Kirksville, MO27 miles from this station, 51.9°F a year
- Rathbun, IA33 miles from this station, 50.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made