McComb, Mississippi climate: Normal weather by month, frost dates and records
McComb's normal year runs from 38°F January nights to 91°F July afternoons, with 60.6 inches of precipitation and less than an inch of snow (0.2 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.0°C, January lows of 4°C, July highs of 33°C, 1,539 mm of precipitation a year.
- NOAA stationMcComb/Pike County/John E Lewis Airport
- Station IDUSW00093919
- Location31.18°N 90.47°W
- Elevation413 ft (126 m)
- Population11,762
On October 14, the normal high in McComb is 80°F and the normal low 57°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for McComb.
- Jan 60° 38°
- Feb 64° 42°
- Mar 71° 48°
- Apr 77° 54°
- May 84° 62°
- Jun 89° 69°
- Jul 91° 71°
- Aug 91° 71°
- Sep 87° 67°
- Oct 79° 56°
- Nov 69° 45°
- Dec 62° 41°
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 McComb each month?
July is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 38°F. The most precipitation falls in January (6.40 in), the least in October (3.79 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 38°F | 49.1°F | 6.40 | 11 | <1 | 10 | 10 h 20 min |
| February | 64°F | 42°F | 53.0°F | 5.13 | 10 | <1 | 6 | 11 h |
| March | 71°F | 48°F | 59.5°F | 5.51 | 10 | <1 | 2 | 12 h |
| April | 77°F | 54°F | 65.5°F | 5.02 | 9 | <1 | <1 | 12 h 50 min |
| May | 84°F | 62°F | 73.1°F | 4.55 | 9 | 5 | <1 | 13 h 40 min |
| June | 89°F | 69°F | 79.2°F | 5.18 | 12 | 18 | <1 | 14 h 10 min |
| July | 91°F | 71°F | 81.1°F | 5.95 | 14 | 23 | <1 | 14 h |
| August | 91°F | 71°F | 81.0°F | 5.83 | 12 | 24 | <1 | 13 h 20 min |
| September | 87°F | 67°F | 76.9°F | 4.30 | 9 | 13 | <1 | 12 h 20 min |
| October | 79°F | 56°F | 67.5°F | 3.79 | 7 | 2 | <1 | 11 h 30 min |
| November | 69°F | 45°F | 56.9°F | 3.91 | 9 | <1 | 3 | 10 h 40 min |
| December | 62°F | 41°F | 51.1°F | 5.03 | 11 | <1 | 8 | 10 h 10 min |
| Year (annual) | 77°F | 55°F | 66.2°F | 60.60 | 121 | 84 | 30 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 4°C | 9.5°C | 163 mm |
| February | 18°C | 5°C | 11.7°C | 130 mm |
| March | 22°C | 9°C | 15.3°C | 140 mm |
| April | 25°C | 12°C | 18.6°C | 128 mm |
| May | 29°C | 17°C | 22.8°C | 116 mm |
| June | 32°C | 21°C | 26.2°C | 132 mm |
| July | 33°C | 22°C | 27.3°C | 151 mm |
| August | 33°C | 22°C | 27.2°C | 148 mm |
| September | 31°C | 19°C | 24.9°C | 109 mm |
| October | 26°C | 13°C | 19.7°C | 96 mm |
| November | 20°C | 7°C | 13.8°C | 99 mm |
| December | 17°C | 5°C | 10.6°C | 128 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093919; 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 McComb?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (7).
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 USW00093919.
When is the last frost in McComb?
In McComb, the last spring frost (32°F) comes after March 11 in half of years and after April 2 in one year in ten; the first autumn frost comes before November 18 in half of years and before November 1 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
- March 111 year in 10 after April 2; 9 in 10 after February 17
- First autumn frost, half of years before
- November 181 year in 10 before November 1; 9 in 10 before December 7
NOAA puts the median frost-free season at 253 days, and the season without a hard freeze (28°F) at 283 days.
A hard freeze (28°F) comes after February 25 in half of springs and before December 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts McComb in zone 8b in ZIP code 39648. By the map's own method, the average of each year's coldest night over 1991-2020, McComb's NOAA station is in zone 8b: the coldest night of a typical year reaches 19°F (30 complete years).
Frost dates for every NOAA station in Mississippi · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00093919; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 McComb?
In a normal year in McComb, 84 days a year reach 90°F (2 of them 100°F or more), 30 nights fall to 32°F or colder and 121 days bring measurable precipitation.
- Days at 90°F or more
- 84a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 30a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 121a normal year
The highest temperature in this station's record (since 1948) is 106°F, on August 30, 2000; the lowest is 2°F, on January 21, 1985.
The wettest calendar year on that record is 2002, with 85.53 in; the snowiest season is 1967–68, with 7.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00093919; records: ACIS (NOAA Regional Climate Centers), station USW00093919. Records use complete months only; a month missing more than three days is left out.
How humid and windy is McComb, and how clear are its skies?
The summer (June-August) dew point averages 71°F. The muggiest month is July, with an average dew point of 72°F, above the 65°F at which most people call the air sticky; the driest air comes in January (40°F). February is the windiest month (7.0 mph on average), and September has the most clear or nearly clear hours (72%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 40°F | 70% | 48% | 6.5 mph | 54% | 33% |
| February | 45°F | 69% | 47% | 7.0 mph | 53% | 31% |
| March | 52°F | 71% | 48% | 6.8 mph | 55% | 23% |
| April | 59°F | 73% | 49% | 6.2 mph | 60% | 20% |
| May | 67°F | 75% | 53% | 4.7 mph | 61% | 13% |
| June | 70°F | 76% | 56% | 4.0 mph | 63% | 10% |
| July | 72°F | 77% | 57% | 3.8 mph | 68% | 6% |
| August | 70°F | 76% | 55% | 4.1 mph | 68% | 10% |
| September | 62°F | 72% | 49% | 4.8 mph | 72% | 13% |
| October | 52°F | 74% | 49% | 5.0 mph | 68% | 17% |
| November | 45°F | 75% | 51% | 5.6 mph | 60% | 26% |
| December | 41°F | 74% | 53% | 6.3 mph | 55% | 31% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093919. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is McComb?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around McComb, 4.6 kWh per square metre a day. September is the sunniest month (82%) and February the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.8 |
| February | 68% | 3.4 |
| March | 73% | 4.5 |
| April | 78% | 5.6 |
| May | 80% | 6.1 |
| June | 80% | 6.3 |
| July | 79% | 6.0 |
| August | 81% | 5.7 |
| September | 82% | 5.1 |
| October | 81% | 4.3 |
| November | 78% | 3.3 |
| December | 69% | 2.5 |
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 McComb need?
A normal year in McComb brings 1,921 heating degree days, 64% fewer than the median U.S. place (5,373), and 2,369 cooling degree days, 2.6 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,290 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 499 | 6 |
| February | 348 | 14 |
| March | 211 | 39 |
| April | 79 | 94 |
| May | 9 | 260 |
| June | 0 | 424 |
| July | 0 | 498 |
| August | 0 | 496 |
| September | 2 | 359 |
| October | 66 | 143 |
| November | 266 | 24 |
| December | 441 | 12 |
| Year (annual) | 1,921 | 2,369 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093919. 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 McComb been warmer than normal lately?
2025 averaged 67.7°F, 1.5°F above the 1991-2020 normal of 66.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.0°F | +0.8°F | 80.75 |
| 2022 | 66.4°F | +0.2°F | 56.47 |
| 2023 | 68.3°F | +2.1°F | 44.94 |
| 2024 | 67.6°F | +1.4°F | 60.35 |
| 2025 | 67.7°F | +1.5°F | – |
Over 75 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 4.4°F per century (+0.24°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00093919; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does McComb's climate compare?
McComb is warmer than 66 of the other 80 places with their own NOAA record in Mississippi, and wetter than 49. Across the 7,247 U.S. stations with normals, its annual mean of 66.2°F is warmer than 90%.
In the Köppen classification computed from these normals, McComb is Cfa: temperate, 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 McComb share this climate record?
4 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.
- Kentwood, LA2,195 people · 17 mi S
- Magnolia, MS1,816 people · 1 mi S
- Summit, MS1,438 people · 7 mi N
- Fernwood, MS19 people · 1 mi E
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 McComb's climate
What is the coldest month in McComb?
January, with a normal high of 60°F and a normal low of 38°F. The warmest is July (91°F by day, 71°F at night).
Does it snow in McComb?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in McComb?
January, with 6.40 in of precipitation in a normal year; the driest is October with 3.79 in.
What plant hardiness zone is McComb in?
The USDA's 2023 map puts McComb in zone 8b in ZIP code 39648. By the same method at McComb's NOAA station, the coldest night of a typical year reaches 19°F (30 years, 1991-2020): zone 8b.
How late can frost come in McComb?
In half of years the last 32°F night comes after March 11; in one year in ten it comes after April 2. Waiting until April 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- McComb in OctoberThis month day by day, its records and recent years
- Mississippi climateThe statewide normals and every place in the state
- Liberty, MS21 miles from this station, 65.2°F a year
- Brookhaven, MS25 miles from this station, 64.4°F a year
- Tylertown, MS25 miles from this station, 66.0°F a year
- Meadville, MS31 miles from this station, 65.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made