Winona, Mississippi climate: Normal weather by month, frost dates and records
Winona's normal year runs from 29°F January nights to 89°F July afternoons, with 59.0 inches of precipitation and less than an inch of snow (0.8 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.7°C, January lows of −2°C, July highs of 32°C, 1,499 mm of precipitation a year.
- NOAA stationWinona (5 mi E)
- Station IDUSC00229743
- Location33.48°N 89.62°W
- Elevation392 ft (120 m)
- Population3,906
On October 23, the normal high in Winona is 73°F and the normal low 44°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 Winona.
- Jan 53° 29°
- Feb 57° 32°
- Mar 65° 39°
- Apr 73° 46°
- May 80° 56°
- Jun 87° 64°
- Jul 89° 67°
- Aug 90° 66°
- Sep 85° 60°
- Oct 75° 47°
- Nov 64° 37°
- Dec 55° 32°
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 Winona each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 29°F. The most precipitation falls in April (6.12 in), the least in October (3.74 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 53°F | 29°F | 40.9°F | 5.38 | 11 | <1 | 20 | 10 h 10 min |
| February | 57°F | 32°F | 44.5°F | 5.45 | 10 | <1 | 16 | 11 h |
| March | 65°F | 39°F | 51.9°F | 5.64 | 11 | <1 | 10 | 12 h |
| April | 73°F | 46°F | 59.4°F | 6.12 | 9 | <1 | 2 | 13 h |
| May | 80°F | 56°F | 67.7°F | 4.98 | 10 | 1 | <1 | 13 h 50 min |
| June | 87°F | 64°F | 75.3°F | 4.49 | 9 | 8 | <1 | 14 h 20 min |
| July | 89°F | 67°F | 78.3°F | 5.33 | 10 | 16 | <1 | 14 h 10 min |
| August | 90°F | 66°F | 77.8°F | 4.07 | 9 | 16 | <1 | 13 h 30 min |
| September | 85°F | 60°F | 72.4°F | 3.95 | 7 | 9 | <1 | 12 h 30 min |
| October | 75°F | 47°F | 61.2°F | 3.74 | 7 | 1 | 2 | 11 h 20 min |
| November | 64°F | 37°F | 50.1°F | 4.16 | 8 | <1 | 12 | 10 h 30 min |
| December | 55°F | 32°F | 43.6°F | 5.72 | 10 | <1 | 18 | 10 h |
| Year (annual) | 73°F | 48°F | 60.3°F | 59.03 | 111 | 51 | 81 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | −2°C | 4.9°C | 137 mm |
| February | 14°C | 0°C | 6.9°C | 138 mm |
| March | 19°C | 4°C | 11.1°C | 143 mm |
| April | 23°C | 8°C | 15.2°C | 155 mm |
| May | 27°C | 13°C | 19.8°C | 126 mm |
| June | 30°C | 18°C | 24.1°C | 114 mm |
| July | 32°C | 20°C | 25.7°C | 135 mm |
| August | 32°C | 19°C | 25.4°C | 103 mm |
| September | 30°C | 15°C | 22.4°C | 100 mm |
| October | 24°C | 8°C | 16.2°C | 95 mm |
| November | 18°C | 3°C | 10.1°C | 106 mm |
| December | 13°C | 0°C | 6.4°C | 145 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00229743; 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 Winona?
Normal highs sit between 65°F and 85°F in March, April, May and October. 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 USC00229743.
When is the last frost in Winona?
In Winona, the last spring frost (32°F) comes after April 7 in half of years and after April 24 in one year in ten; the first autumn frost comes before October 29 in half of years and before October 16 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
- April 71 year in 10 after April 24; 9 in 10 after March 22
- First autumn frost, half of years before
- October 291 year in 10 before October 16; 9 in 10 before November 11
NOAA puts the median frost-free season at 203 days, and the season without a hard freeze (28°F) at 227 days.
A hard freeze (28°F) comes after March 26 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Winona in zone 8a in ZIP code 38967, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Winona's NOAA station is in zone 8a: the coldest night of a typical year reaches 12°F (25 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 USC00229743; 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 Winona?
In a normal year in Winona, 51 days a year reach 90°F (1 of them 100°F or more), 81 nights fall to 32°F or colder and 111 days bring measurable precipitation.
- Days at 90°F or more
- 51a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 81a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 111a normal year
The highest temperature in this station's record (since 1953) is 105°F, on August 31, 2000; the lowest is −9°F, on January 30, 1966.
The wettest calendar year on that record is 1983, with 79.95 in; the snowiest season is 1959–60, with 9.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00229743; records: ACIS (NOAA Regional Climate Centers), station USC00229743. Records use complete months only; a month missing more than three days is left out.
How sunny is Winona?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Winona, 4.5 kWh per square metre a day. June is the sunniest month (82%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.6 |
| February | 66% | 3.1 |
| March | 71% | 4.3 |
| April | 76% | 5.5 |
| May | 79% | 6.1 |
| June | 82% | 6.5 |
| July | 81% | 6.2 |
| August | 82% | 5.7 |
| September | 82% | 5.0 |
| October | 79% | 4.0 |
| November | 77% | 3.0 |
| December | 69% | 2.3 |
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 Winona need?
A normal year in Winona brings 3,305 heating degree days, 38% fewer than the median U.S. place (5,373), and 1,603 cooling degree days, 77% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,798 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 748 | 1 |
| February | 577 | 1 |
| March | 412 | 7 |
| April | 203 | 34 |
| May | 51 | 137 |
| June | 2 | 311 |
| July | 0 | 411 |
| August | 0 | 397 |
| September | 17 | 239 |
| October | 176 | 58 |
| November | 453 | 6 |
| December | 667 | 3 |
| Year (annual) | 3,305 | 1,603 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00229743. 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 Winona been warmer than normal lately?
2022 averaged 60.4°F, 0.1°F above the 1991-2020 normal of 60.3°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 60.4°F | +0.1°F | 54.80 |
Over 54 complete years from 1956 to 2024, the station's annual mean temperature rose at a fitted 2.9°F per century (+0.16°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00229743; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Winona's climate compare?
Winona is warmer than 7 of the other 80 places with their own NOAA record in Mississippi, and wetter than 37. Across the 7,247 U.S. stations with normals, its annual mean of 60.3°F is warmer than 76%.
In the Köppen classification computed from these normals, Winona 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 Winona 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.
- Vaiden, MS885 people · 13 mi SW
- Kilmichael, MS563 people · 5 mi SE
- French Camp, MS255 people · 19 mi SE
- Stewart, MS113 people · 11 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 Winona's climate
What is the coldest month in Winona?
January, with a normal high of 53°F and a normal low of 29°F. The warmest is July (89°F by day, 67°F at night).
Does it snow in Winona?
Rarely: NOAA's normal is 0.8 inch a year.
What is the rainiest month in Winona?
April, with 6.12 in of precipitation in a normal year; the driest is October with 3.74 in.
What plant hardiness zone is Winona in?
The USDA's 2023 map puts Winona in zone 8a in ZIP code 38967, the nearest ZIP area. By the same method at Winona's NOAA station, the coldest night of a typical year reaches 12°F (25 years, 1991-2020): zone 8a.
How late can frost come in Winona?
In half of years the last 32°F night comes after April 7; in one year in ten it comes after April 24. Waiting until April 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Mississippi climateThe statewide normals and every place in the state
- Grenada, MS22 miles from this station, 62.5°F a year
- Eupora, MS23 miles from this station, 62.0°F a year
- Greenwood, MS27 miles from this station, 64.0°F a year
- Kosciusko, MS30 miles from this station, 62.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made