Greenville gets more rain and snow than 81% of U.S. towns: 49 inches of precipitation a year
Peak summer warmth arrives in July, with afternoons near 89°. In July, afternoons here are warmer than in 74% of U.S. towns. Decade by decade the climate has edged up, 0.5° above 1901–2000. Plan time outside for April, May, September and October, when highs sit at 70–82°.
A year in Greenville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Greenville’s climate
Compared with towns across the U.S., with Greenville’s place in Missouri beside it.
What a year in Greenville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 215 frost-free days a year
In half of years the last 32° night comes by April 2 and the first by November 2. Frost and day counts come from NOAA’s station at Wappapello Dam, MO, 17 miles from the town’s center, at about the same height.
The 2023 USDA map puts Greenville’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 1°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 49 inches of rain a year
May is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Greenville
75% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Wappapello Dam, MO.
Living with Greenville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
215 frost-free days in zone 7a. The last frost comes by Apr 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 2.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Greenville from natural hazards, river flooding is the largest share (44%); heat waves, cold waves, winter storms and ice storms together are 27%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Greenville and similar climates
TownRatings has no climate map of the towns around Greenville yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Greenville averaged 0.5° warmer than the 1900s. The biggest change is in February (+1.3°).
A smaller shift than in 98% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Greenville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Greenville’s place among Missouri’s.
Greenville weather by month
Highs, lows and precipitation from NOAA’s grid at Greenville’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 44° | 24° | 3.2" | 27° – 42° |
| February | 49° | 27° | 3.3" | 28° – 47° |
| March | 59° | 35° | 4.5" | 40° – 59° |
| April | 70° | 44° | 5.4" | 50° – 63° |
| May | 78° | 54° | 5.6" | 61° – 73° |
| June | 86° | 63° | 3.8" | 70° – 80° |
| July | 89° | 67° | 4.2" | 73° – 84° |
| August | 88° | 65° | 3.7" | 71° – 83° |
| September | 82° | 57° | 3.6" | 66° – 76° |
| October | 71° | 45° | 3.5" | 53° – 63° |
| November | 57° | 35° | 4.7" | 39° – 52° |
| December | 47° | 27° | 3.6" | 24° – 45° |
| Year | 68° | 45° | 49.1" |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 24° to 45°. October is the most reliable, staying within 10°.
Where Greenville’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Greenville’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Wappapello Dam, MO, 17 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Greenville’s climate
What is the weather like in Greenville?
A typical July afternoon reaches 89°, a January night drops to 24°. Milder January nights than 58% of U.S. towns; hotter July afternoons than 74% of U.S. towns.
How cold does it get in Greenville in winter?
January nights average 24°. About 92 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 27°.
How hot does it get in Greenville?
July, with a typical high of 89° and a low of 67°. About 53 days a year reach 90° and 3 reach 100° (Wappapello Dam, MO).
When is the first and last frost in Greenville?
In half of years the last spring frost (32°) comes by April 2 and the first fall frost by November 2, about 215 frost-free days, at Wappapello Dam, MO.
What growing zone is Greenville in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 1°.
What is the best time of year to visit Greenville?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Greenville getting warmer?
Yes: 1991–2020 averaged 0.5° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 98% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Greenville.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.