Tanglewood · Photo: GilbertThompson · CC BY-SA 4.0Summit sits near the top of U.S. towns for precipitation, with 62 inches a year
In July the day’s top temperature is typically 91°. Winters are mild: January nights here are milder than in 85% of U.S. towns. Warming shows here too: 0.7° more than in 1901–2000, led by February. Seedlings are safe outdoors from about March 11, with the first autumn frost due around November 18.
A year in Summit at a glance
Each month’s typical high and low, and what it brings.
What stands out about Summit’s climate
Compared with towns across the U.S., with Summit’s place in Mississippi beside it.
What a year in Summit feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 253 frost-free days a year
In half of years the last 32° night comes by March 11 and the first by November 18. Frost and day counts come from NOAA’s station at Mccomb/pike Co/john E Lewis Airport, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Summit’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 19°. 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 62 inches of rain a year
January is the wettest month and September the driest. Rain falls on about 121 days a year. Snow is rare: about 0.2" in a normal year at Mccomb/pike Co/john E Lewis Airport, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Summit
45% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Mccomb/pike Co/john E Lewis Airport.
Living with Summit’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
253 frost-free days in zone 8b. The last frost comes by Mar 11 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 18.
Months with highs of 62–84° and lows of 40° or more: February, March, April, October and November.
Parks & trails →Of the yearly building losses FEMA expects in Summit from natural hazards, river flooding is the largest share (34%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Summit and similar climates
TownRatings has no climate map of the towns around Summit yet.
Climates most like Summit’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 |
|---|---|---|---|---|
| Summit, MS | 38° | 91° | 62" | 0.2" |
| Magalia, CA | 38° | 92° | 61" | 0.1" |
| Opp, AL | 37° | 91° | 59" | 0.3" |
| DeFuniak Springs, FL | 39° | 91° | 62" | 0.0" |
| Leesville, LA | 38° | 93° | 59" | 0.1" |
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 Summit averaged 0.7° warmer than the 1900s. The biggest change is in February (+1.6°).
A smaller shift than in 92% 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 Summit compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Summit’s place among Mississippi’s.
Summit weather by month
Highs, lows and precipitation from NOAA’s grid at Summit’s center; snow, wet days and snow on the ground from Mccomb/pike Co/john E Lewis Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 60° | 38° | 6.3" | 0.0" | 11 | 0 | 41° – 56° |
| February | 64° | 41° | 5.5" | 0.0" | 10 | 0 | 43° – 63° |
| March | 71° | 47° | 5.5" | 0.1" | 10 | 0 | 53° – 67° |
| April | 77° | 53° | 5.3" | 0.0" | 9 | 0 | 60° – 69° |
| May | 84° | 61° | 4.7" | 0.0" | 9 | 0 | 70° – 77° |
| June | 90° | 68° | 5.3" | 0.0" | 12 | 0 | 76° – 83° |
| July | 91° | 71° | 5.8" | 0.0" | 14 | 0 | 79° – 83° |
| August | 91° | 70° | 5.5" | 0.0" | 12 | 0 | 77° – 84° |
| September | 88° | 66° | 4.0" | 0.0" | 9 | 0 | 74° – 81° |
| October | 79° | 54° | 4.2" | 0.0" | 7 | 0 | 62° – 72° |
| November | 69° | 44° | 4.4" | 0.0" | 9 | 0 | 52° – 62° |
| December | 62° | 40° | 5.3" | 0.1" | 11 | 0 | 42° – 59° |
| Year | 77° | 54° | 61.6" | 0.2" | 121 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 43° to 63°. July is the most reliable, staying within 4°.
Where Summit’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 Summit’s center.
- Snow: Mccomb/pike Co/john E Lewis Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Mccomb/pike Co/john E Lewis Airport, 7 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 Summit’s climate
What is the weather like in Summit?
A typical July afternoon reaches 91°, a January night drops to 38°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; hotter July afternoons than 84% of U.S. towns.
How cold does it get in Summit in winter?
January nights average 38°. About 30 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 41°.
How much snow does Summit get?
About 0.2 inches in a normal winter at Mccomb/pike Co/john E Lewis Airport, so most winters see none.
How hot does it get in Summit?
July, with a typical high of 91° and a low of 71°. About 84 days a year reach 90° and 2 reach 100° (Mccomb/pike Co/john E Lewis Airport).
When is the first and last frost in Summit?
In half of years the last spring frost (32°) comes by March 11 and the first fall frost by November 18, about 253 frost-free days, at Mccomb/pike Co/john E Lewis Airport.
What growing zone is Summit in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 19°.
What is the best time of year to visit Summit?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Summit getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Summit.
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.