Monticello, Mississippi climate: Normal weather by month, frost dates and records
Monticello's normal year runs from 36°F January nights to 96°F July afternoons, with 60.4 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 19.6°C, January lows of 2°C, July highs of 35°C, 1,533 mm of precipitation a year.
- NOAA stationMonticello
- Station IDUSC00225987
- Location31.55°N 90.11°W
- Elevation191 ft (58 m)
- Population1,369
On October 23, the normal high in Monticello is 79°F and the normal low 50°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Monticello.
- Jan 62° 36°
- Feb 67° 40°
- Mar 74° 46°
- Apr 81° 53°
- May 88° 61°
- Jun 94° 69°
- Jul 96° 71°
- Aug 96° 71°
- Sep 91° 66°
- Oct 82° 54°
- Nov 72° 44°
- Dec 64° 39°
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 Monticello each month?
July is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 36°F. The most precipitation falls in January (5.97 in), the least in September (3.56 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 36°F | 48.9°F | 5.97 | 9 | <1 | 13 | 10 h 20 min |
| February | 67°F | 40°F | 53.2°F | 5.95 | 8 | <1 | 9 | 11 h |
| March | 74°F | 46°F | 60.1°F | 5.70 | 8 | <1 | 3 | 12 h |
| April | 81°F | 53°F | 66.9°F | 5.76 | 7 | 1 | <1 | 13 h |
| May | 88°F | 61°F | 74.5°F | 4.49 | 7 | 9 | <1 | 13 h 40 min |
| June | 94°F | 69°F | 81.0°F | 4.71 | 9 | 22 | <1 | 14 h 10 min |
| July | 96°F | 71°F | 83.5°F | 5.88 | 10 | 27 | <1 | 14 h |
| August | 96°F | 71°F | 83.3°F | 4.22 | 9 | 27 | <1 | 13 h 20 min |
| September | 91°F | 66°F | 78.5°F | 3.56 | 6 | 17 | <1 | 12 h 20 min |
| October | 82°F | 54°F | 67.7°F | 4.24 | 5 | 3 | 1 | 11 h 30 min |
| November | 72°F | 44°F | 57.5°F | 4.67 | 6 | <1 | 6 | 10 h 30 min |
| December | 64°F | 39°F | 51.3°F | 5.20 | 8 | <1 | 13 | 10 h 10 min |
| Year (annual) | 80°F | 54°F | 67.2°F | 60.35 | 91 | 105 | 45 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 17°C | 2°C | 9.4°C | 152 mm |
| February | 19°C | 4°C | 11.8°C | 151 mm |
| March | 23°C | 8°C | 15.6°C | 145 mm |
| April | 27°C | 12°C | 19.4°C | 146 mm |
| May | 31°C | 16°C | 23.6°C | 114 mm |
| June | 34°C | 20°C | 27.2°C | 120 mm |
| July | 35°C | 22°C | 28.6°C | 149 mm |
| August | 35°C | 22°C | 28.5°C | 107 mm |
| September | 33°C | 19°C | 25.8°C | 90 mm |
| October | 28°C | 12°C | 19.8°C | 108 mm |
| November | 22°C | 6°C | 14.2°C | 119 mm |
| December | 18°C | 4°C | 10.7°C | 132 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00225987; 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 Monticello?
Normal highs sit between 65°F and 85°F in February, March, April, October and November. Of those, October has the fewest days with rain (5).
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 USC00225987.
When is the last frost in Monticello?
In Monticello, the last spring frost (32°F) comes after March 12 in half of years and after April 3 in one year in ten; the first autumn frost comes before November 10 in half of years and before October 23 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 121 year in 10 after April 3; 9 in 10 after February 22
- First autumn frost, half of years before
- November 101 year in 10 before October 23; 9 in 10 before December 3
NOAA puts the median frost-free season at 242 days, and the season without a hard freeze (28°F) at 272 days.
A hard freeze (28°F) comes after February 27 in half of springs and before November 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Monticello in zone 8b in ZIP code 39654, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Monticello's NOAA station is in zone 9a: the coldest night of a typical year reaches 20°F (16 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Mississippi · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00225987; 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 Monticello?
In a normal year in Monticello, 105 days a year reach 90°F (10 of them 100°F or more), 45 nights fall to 32°F or colder and 91 days bring measurable precipitation.
- Days at 90°F or more
- 105a normal year
- Days at 100°F or more
- 10a normal year
- Nights at 32°F or colder
- 45a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 91a normal year
The highest temperature in this station's record (since 1907) is 110°F, on July 22, 1997; the lowest is 3°F, on January 27, 1940.
The wettest calendar year on that record is 1973, with 82.65 in; the snowiest season is 1959–60, with 6.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00225987; records: ACIS (NOAA Regional Climate Centers), station USC00225987. Records use complete months only; a month missing more than three days is left out.
How sunny is Monticello?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Monticello, 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 Monticello need?
A normal year in Monticello brings 1,893 heating degree days, 65% fewer than the median U.S. place (5,373), and 2,726 cooling degree days, 3.0 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 6,663 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 507 | 6 |
| February | 343 | 12 |
| March | 203 | 51 |
| April | 70 | 127 |
| May | 7 | 302 |
| June | 0 | 480 |
| July | 0 | 575 |
| August | 0 | 566 |
| September | 2 | 408 |
| October | 69 | 152 |
| November | 254 | 31 |
| December | 439 | 16 |
| Year (annual) | 1,893 | 2,726 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00225987. 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 Monticello's climate compare?
Monticello is warmer than 75 of the other 80 places with their own NOAA record in Mississippi, and wetter than 45. Across the 7,247 U.S. stations with normals, its annual mean of 67.2°F is warmer than 92%.
In the Köppen classification computed from these normals, Monticello 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 Monticello 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.
- Prentiss, MS911 people · 14 mi E
- New Hebron, MS364 people · 14 mi NE
- Silver Creek, MS174 people · 7 mi NE
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 Monticello's climate
What is the coldest month in Monticello?
January, with a normal high of 62°F and a normal low of 36°F. The warmest is July (96°F by day, 71°F at night).
Does it snow in Monticello?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in Monticello?
January, with 5.97 in of precipitation in a normal year; the driest is September with 3.56 in.
What plant hardiness zone is Monticello in?
The USDA's 2023 map puts Monticello in zone 8b in ZIP code 39654, the nearest ZIP area. By the same method at Monticello's NOAA station, the coldest night of a typical year reaches 20°F (16 years, 1991-2020): zone 9a.
How late can frost come in Monticello?
In half of years the last 32°F night comes after March 12; in one year in ten it comes after April 3. Waiting until April 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Mississippi climateThe statewide normals and every place in the state
- Brookhaven, MS21 miles from this station, 64.4°F a year
- Columbia, MS26 miles from this station, 66.5°F a year
- Hazlehurst, MS28 miles from this station, 65.7°F a year
- D'Lo, MS30 miles from this station, 67.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made