No extremes in Oak Grove: its weather tracks the middle of U.S. towns
The depth of winter brings overnight lows near 20°. Summer afternoons here are warmer than in 69% of U.S. towns. Warming shows here too: 1.1° more than in 1901–2000, led by March. Radiators earn their keep from November to March, the months that average under 50°.
A year in Oak Grove at a glance
Each month’s typical high and low, and what it brings.
What stands out about Oak Grove’s climate
Compared with towns across the U.S., with Oak Grove’s place in Missouri beside it.
What a year in Oak Grove feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 191 frost-free days a year
In half of years the last 32° night comes by April 13 and the first by October 23. Frost and day counts come from NOAA’s station at Elm, MO, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts Oak Grove’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −5°. 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 12 inches of snow a winter
Snow, measured at Elm, MO, falls mostly in January. Precipitation (rain plus melted snow) adds up to 41 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 107 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Oak Grove
81% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Elm, MO.
Living with Oak Grove’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
191 frost-free days in zone 6a. The last frost comes by Apr 13 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 23.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 6.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Oak Grove from natural hazards, river flooding is the largest share (38%); heat waves, cold waves, winter storms and ice storms together are 27%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Oak Grove and similar climates
TownRatings has no climate map of the towns around Oak Grove yet.
Climates most like Oak Grove’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Oak Grove, MO | 20° | 88° | 41" | 12" |
| Jerseyville, IL | 21° | 87° | 41" | 13" |
| Terre Haute, IN | 21° | 87° | 43" | 15" |
| Hamilton, OH | 22° | 87° | 43" | 9.7" |
| Lake of the Woods, VA | 25° | 88° | 44" | 11" |
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 Oak Grove averaged 1.1° warmer than the 1900s. The biggest change is in March (+2.5°).
A smaller shift than in 71% 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 Oak Grove compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Oak Grove’s place among Missouri’s.
Oak Grove weather by month
Highs, lows and precipitation from NOAA’s grid at Oak Grove’s center; snow, wet days and snow on the ground from Elm, MO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 20° | 1.3" | 3.8" | 7 | 23° – 40° |
| February | 44° | 24° | 1.7" | 2.9" | 7 | 25° – 44° |
| March | 56° | 34° | 2.6" | 1.1" | 10 | 38° – 58° |
| April | 66° | 44° | 4.2" | 0.1" | 11 | 47° – 60° |
| May | 75° | 54° | 5.5" | 0.0" | 12 | 59° – 73° |
| June | 84° | 64° | 5.1" | 0.0" | 10 | 70° – 78° |
| July | 88° | 68° | 4.8" | 0.0" | 9 | 73° – 84° |
| August | 87° | 66° | 4.3" | 0.0" | 9 | 70° – 81° |
| September | 79° | 57° | 4.1" | 0.0" | 8 | 63° – 75° |
| October | 68° | 45° | 3.3" | 0.0" | 9 | 50° – 62° |
| November | 54° | 34° | 2.3" | 0.7" | 8 | 37° – 52° |
| December | 43° | 24° | 1.9" | 3.3" | 7 | 20° – 40° |
| Year | 65° | 44° | 41.0" | 11.9" | 107 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 38° to 58°. June is the most reliable, staying within 8°.
Where Oak Grove’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 Oak Grove’s center.
- Snow: Elm, MO.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Elm, MO, 11 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 Oak Grove’s climate
What is the weather like in Oak Grove?
A typical July afternoon reaches 88°, a January night drops to 20°, and about 12 inches of snow falls in a normal winter. Colder January nights than 59% of U.S. towns; hotter July afternoons than 69% of U.S. towns.
How cold does it get in Oak Grove in winter?
January nights average 20°. About 116 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 23°.
How much snow does Oak Grove get?
About 12 inches in a normal winter at Elm, MO, most of it in January.
How hot does it get in Oak Grove?
July, with a typical high of 88° and a low of 68°. About 33 days a year reach 90° and 2 reach 100° (Elm, MO).
When is the first and last frost in Oak Grove?
In half of years the last spring frost (32°) comes by April 13 and the first fall frost by October 23, about 191 frost-free days, at Elm, MO.
What growing zone is Oak Grove in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −5°.
What is the best time of year to visit Oak Grove?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Oak Grove getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 71% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Oak Grove.
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.