St. Francisville, Louisiana climate: Normal weather by month, frost dates and records
St. Francisville's normal year runs from 36°F January nights to 93°F August afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.0°C, January lows of 2°C, August highs of 34°C.
- NOAA stationSt Francisville (1 mi NE)
- Station IDUSC00168138
- Location30.79°N 91.37°W
- Elevation129 ft (39 m)
- Population1,484
On October 23, the normal high in St. Francisville is 78°F and the normal low 53°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for St. Francisville.
- Jan 60° 36°
- Feb 64° 41°
- Mar 72° 48°
- Apr 78° 53°
- May 84° 62°
- Jun 89° 69°
- Jul 91° 71°
- Aug 93° 71°
- Sep 89° 66°
- Oct 80° 56°
- Nov 70° 46°
- Dec 61° 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 St. Francisville each month?
August is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 36°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 60°F | 36°F | 48.1°F | – | <1 | 10 | 10 h 20 min |
| February | 64°F | 41°F | 52.6°F | – | <1 | 4 | 11 h 10 min |
| March | 72°F | 48°F | 60.0°F | – | <1 | 2 | 12 h |
| April | 78°F | 53°F | 65.2°F | – | <1 | <1 | 12 h 50 min |
| May | 84°F | 62°F | 72.9°F | – | 5 | <1 | 13 h 40 min |
| June | 89°F | 69°F | 78.8°F | – | 16 | <1 | 14 h 10 min |
| July | 91°F | 71°F | 81.1°F | – | 23 | <1 | 14 h |
| August | 93°F | 71°F | 81.9°F | – | 27 | <1 | 13 h 20 min |
| September | 89°F | 66°F | 77.4°F | – | 21 | <1 | 12 h 20 min |
| October | 80°F | 56°F | 68.2°F | – | 6 | <1 | 11 h 30 min |
| November | 70°F | 46°F | 57.6°F | – | <1 | 4 | 10 h 40 min |
| December | 61°F | 40°F | 50.3°F | – | <1 | 9 | 10 h 10 min |
| Year (annual) | 78°F | 55°F | 66.2°F | – | 96 | 28 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 16°C | 2°C | 8.9°C |
| February | 18°C | 5°C | 11.4°C |
| March | 22°C | 9°C | 15.6°C |
| April | 25°C | 11°C | 18.4°C |
| May | 29°C | 17°C | 22.7°C |
| June | 32°C | 21°C | 26.0°C |
| July | 33°C | 22°C | 27.3°C |
| August | 34°C | 22°C | 27.7°C |
| September | 31°C | 19°C | 25.2°C |
| October | 27°C | 13°C | 20.1°C |
| November | 21°C | 8°C | 14.2°C |
| December | 16°C | 4°C | 10.2°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, New Roads (4 miles away), gets 0 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00168138; 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 St. Francisville?
Normal highs sit between 65°F and 85°F in March, April, May, October and November.
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 USC00168138.
When is the last frost in St. Francisville?
In St. Francisville, the last spring frost (32°F) comes after March 2 in half of years and after March 29 in one year in ten; the first autumn frost comes before November 24 in half of years and before November 5 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 21 year in 10 after March 29; 9 in 10 after January 31
- First autumn frost, half of years before
- November 241 year in 10 before November 5; 9 in 10 before December 16
NOAA puts the median frost-free season at 268 days, and the season without a hard freeze (28°F) at 302 days.
A hard freeze (28°F) comes after February 7 in half of springs and before December 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts St. Francisville in zone 9a in ZIP code 70775, the nearest ZIP area.
Frost dates for every NOAA station in Louisiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00168138; 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 St. Francisville?
In a normal year in St. Francisville, 96 days a year reach 90°F and 28 nights fall to 32°F or colder.
- Days at 90°F or more
- 96a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 28a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00168138.
How sunny is St. Francisville?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around St. Francisville, 4.7 kWh per square metre a day. October is the sunniest month (83%) and February the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.9 |
| February | 68% | 3.4 |
| March | 74% | 4.6 |
| April | 79% | 5.7 |
| May | 81% | 6.2 |
| June | 79% | 6.1 |
| July | 79% | 5.9 |
| August | 80% | 5.6 |
| September | 82% | 5.1 |
| October | 83% | 4.4 |
| November | 80% | 3.4 |
| December | 70% | 2.6 |
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 St. Francisville need?
A normal year in St. Francisville brings 1,873 heating degree days, 65% fewer than the median U.S. place (5,373), and 2,325 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 6,207 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 523 | 0 |
| February | 352 | 5 |
| March | 191 | 36 |
| April | 53 | 60 |
| May | 4 | 247 |
| June | 0 | 414 |
| July | 0 | 501 |
| August | 0 | 523 |
| September | 2 | 373 |
| October | 44 | 141 |
| November | 249 | 26 |
| December | 456 | 1 |
| Year (annual) | 1,873 | 2,325 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00168138. 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 St. Francisville been warmer than normal lately?
2023 averaged 69.0°F, 2.8°F above the 1991-2020 normal of 66.2°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 66.7°F | +0.5°F |
| 2022 | 66.4°F | +0.2°F |
| 2023 | 69.0°F | +2.8°F |
Source: observed years: ACIS, station USC00168138. A year counts only with all twelve months complete.
How does St. Francisville's climate compare?
St. Francisville is warmer than 23 of the other 64 places with their own NOAA record in Louisiana. Across the 7,247 U.S. stations with normals, its annual mean of 66.2°F is warmer than 90%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about St. Francisville's climate
What is the coldest month in St. Francisville?
January, with a normal high of 60°F and a normal low of 36°F. The warmest is August (93°F by day, 71°F at night).
Does it snow in St. Francisville?
Rarely. NOAA publishes no 1991-2020 snowfall normal for St. Francisville's NOAA station; the nearest record that keeps one, New Roads (4 miles away), records 0 inches of snow in a normal year.
What plant hardiness zone is St. Francisville in?
The USDA's 2023 map puts St. Francisville in zone 9a in ZIP code 70775, the nearest ZIP area.
How late can frost come in St. Francisville?
In half of years the last 32°F night comes after March 2; in one year in ten it comes after March 29. Waiting until March 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Louisiana climateThe statewide normals and every place in the state
- New Roads, LA4 miles from this station, 68.8°F a year
- Baton Rouge, LA22 miles from this station, 68.5°F a year
- Woodville, MS22 miles from this station, 66.3°F a year
- Clinton, LA24 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