Picayune, Mississippi climate: Normal weather by month, frost dates and records
Picayune's normal year runs from 38°F January nights to 92°F July afternoons, with 66.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.1°C, January lows of 3°C, July highs of 33°C, 1,695 mm of precipitation a year.
- NOAA stationPicayune
- Station IDUSC00226921
- Location30.54°N 89.70°W
- Elevation64 ft (20 m)
- Population12,017
On October 23, the normal high in Picayune is 78°F and the normal low 52°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Picayune.
- Jan 62° 38°
- Feb 66° 41°
- Mar 72° 47°
- Apr 78° 53°
- May 85° 61°
- Jun 89° 68°
- Jul 92° 71°
- Aug 91° 71°
- Sep 88° 66°
- Oct 81° 55°
- Nov 71° 45°
- Dec 65° 40°
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 Picayune each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 38°F. The most precipitation falls in June (6.55 in), the least in November (4.31 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 38°F | 49.8°F | 6.39 | 9 | <1 | 10 | 10 h 20 min |
| February | 66°F | 41°F | 53.1°F | 4.87 | 7 | <1 | 6 | 11 h 10 min |
| March | 72°F | 47°F | 59.5°F | 5.21 | 8 | <1 | 2 | 12 h |
| April | 78°F | 53°F | 65.7°F | 5.90 | 6 | <1 | <1 | 12 h 50 min |
| May | 85°F | 61°F | 72.9°F | 5.02 | 6 | 4 | <1 | 13 h 40 min |
| June | 89°F | 68°F | 78.6°F | 6.55 | 11 | 13 | <1 | 14 h 10 min |
| July | 92°F | 71°F | 81.0°F | 6.46 | 11 | 20 | <1 | 14 h |
| August | 91°F | 71°F | 81.0°F | 6.38 | 11 | 21 | <1 | 13 h 20 min |
| September | 88°F | 66°F | 77.0°F | 4.86 | 8 | 12 | <1 | 12 h 20 min |
| October | 81°F | 55°F | 67.8°F | 5.04 | 6 | 1 | <1 | 11 h 30 min |
| November | 71°F | 45°F | 57.7°F | 4.31 | 6 | <1 | 3 | 10 h 40 min |
| December | 65°F | 40°F | 52.4°F | 5.73 | 9 | <1 | 10 | 10 h 10 min |
| Year (annual) | 78°F | 55°F | 66.4°F | 66.72 | 97 | 71 | 31 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 3°C | 9.9°C | 162 mm |
| February | 19°C | 5°C | 11.7°C | 124 mm |
| March | 22°C | 8°C | 15.3°C | 132 mm |
| April | 26°C | 12°C | 18.7°C | 150 mm |
| May | 29°C | 16°C | 22.7°C | 128 mm |
| June | 32°C | 20°C | 25.9°C | 166 mm |
| July | 33°C | 21°C | 27.2°C | 164 mm |
| August | 33°C | 21°C | 27.2°C | 162 mm |
| September | 31°C | 19°C | 25.0°C | 123 mm |
| October | 27°C | 13°C | 19.9°C | 128 mm |
| November | 22°C | 7°C | 14.3°C | 109 mm |
| December | 18°C | 4°C | 11.3°C | 146 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00226921; 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 Picayune?
Normal highs sit between 65°F and 85°F in February, March, April, May, October and November. Of those, April has the fewest days with rain (6).
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 USC00226921.
When is the last frost in Picayune?
In Picayune, the last spring frost (32°F) comes after March 9 in half of years and after March 31 in one year in ten; the first autumn frost comes before November 18 in half of years and before November 3 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 91 year in 10 after March 31; 9 in 10 after February 17
- First autumn frost, half of years before
- November 181 year in 10 before November 3; 9 in 10 before December 11
NOAA puts the median frost-free season at 255 days, and the season without a hard freeze (28°F) at 286 days.
A hard freeze (28°F) comes after February 24 in half of springs and before December 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Picayune in zone 9a in ZIP code 39466.
Frost dates for every NOAA station in Mississippi · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00226921; 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 Picayune?
In a normal year in Picayune, 71 days a year reach 90°F (1 of them 100°F or more), 31 nights fall to 32°F or colder and 97 days bring measurable precipitation.
- Days at 90°F or more
- 71a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 31a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 97a normal year
The highest temperature in this station's record (since 1948) is 103°F, on July 12, 1969; the lowest is 6°F, on January 11, 1962.
The wettest calendar year on that record is 1991, with 101.88 in; the snowiest season is 1963–64, with 10.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00226921; records: ACIS (NOAA Regional Climate Centers), station USC00226921. Records use complete months only; a month missing more than three days is left out.
How sunny is Picayune?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Picayune, 4.7 kWh per square metre a day. October is the sunniest month (84%) and February the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 3.0 |
| February | 71% | 3.5 |
| March | 76% | 4.7 |
| April | 80% | 5.8 |
| May | 83% | 6.4 |
| June | 80% | 6.2 |
| July | 78% | 5.9 |
| August | 80% | 5.6 |
| September | 83% | 5.2 |
| October | 84% | 4.5 |
| November | 81% | 3.5 |
| December | 72% | 2.7 |
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 Picayune need?
A normal year in Picayune brings 1,820 heating degree days, 66% fewer than the median U.S. place (5,373), and 2,351 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 6,325 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 475 | 6 |
| February | 341 | 9 |
| March | 205 | 33 |
| April | 77 | 100 |
| May | 10 | 253 |
| June | 0 | 408 |
| July | 0 | 496 |
| August | 0 | 496 |
| September | 2 | 361 |
| October | 62 | 151 |
| November | 244 | 27 |
| December | 403 | 13 |
| Year (annual) | 1,820 | 2,351 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00226921. 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.
How does Picayune's climate compare?
Picayune is warmer than 70 of the other 80 places with their own NOAA record in Mississippi, and wetter than 71. Across the 7,247 U.S. stations with normals, its annual mean of 66.4°F is warmer than 91%.
In the Köppen classification computed from these normals, Picayune 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 Picayune share this climate record?
3 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.
- Hide-A-Way Lake, MS2,615 people · 5 mi NE
- Sun, LA399 people · 15 mi NW
- Rio, LA217 people · 15 mi NW
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 Picayune's climate
What is the coldest month in Picayune?
January, with a normal high of 62°F and a normal low of 38°F. The warmest is July (92°F by day, 71°F at night).
Does it snow in Picayune?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Picayune?
June, with 6.55 in of precipitation in a normal year; the driest is November with 4.31 in.
What plant hardiness zone is Picayune in?
The USDA's 2023 map puts Picayune in zone 9a in ZIP code 39466.
How late can frost come in Picayune?
In half of years the last 32°F night comes after March 9; in one year in ten it comes after March 31. Waiting until March 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Mississippi climateThe statewide normals and every place in the state
- Bay St. Louis, MS13 miles from this station, 65.6°F a year
- Slidell, LA15 miles from this station, 67.7°F a year
- Bogalusa, LA19 miles from this station, 67.3°F a year
- Poplarville, MS23 miles from this station, 66.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made