Photo: Z28scrambler · CC BY-SA 3.0Hardly any U.S. towns collect more precipitation than Napoleonville: 63 inches a year
July afternoons average 91°. Winter and summer sit 48° apart. By January nights alone, it runs milder than 92% of U.S. towns. Garden planting can start around February 21; autumn frost returns near December 5.
A year in Napoleonville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Napoleonville’s climate
Compared with towns across the U.S., with Napoleonville’s place in Louisiana beside it.
What a year in Napoleonville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 291 frost-free days a year
In half of years the last 32° night comes by February 21 and the first by December 5. Frost and day counts come from NOAA’s station at Donaldsonville 4 Sw, LA, 9 miles from the town’s center, at about the same height.
The 2023 USDA map puts Napoleonville’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 25°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 63 inches of rain a year
August is the wettest month and November the driest. Rain falls on about 113 days a year. Snow is rare: about 0.1" in a normal year at Donaldsonville 4 Sw, LA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Napoleonville
36% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Donaldsonville 4 Sw, LA.
Living with Napoleonville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
291 frost-free days in zone 9b. The last frost comes by Feb 21 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 5.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Napoleonville from natural hazards, hurricanes are the largest share (62%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Napoleonville and similar climates
TownRatings has no climate map of the towns around Napoleonville yet.
Climates most like Napoleonville’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Napoleonville, LA | 43° | 91° | 63" | 0.1" |
| Foley, AL | 42° | 91° | 63" | 0.1" |
| Brent, FL | 42° | 91° | 63" | 0.0" |
| Orange, TX | 42° | 91° | 62" | 0.0" |
| Moss Point, MS | 41° | 90° | 66" | 0.1" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Napoleonville averaged 1.0° warmer than the 1900s. The biggest change is in February (+1.8°).
A smaller shift than in 81% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Napoleonville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Napoleonville’s place among Louisiana’s.
Napoleonville weather by month
Highs, lows and precipitation from NOAA’s grid at Napoleonville’s center; snow, wet days and snow on the ground from Donaldsonville 4 Sw, LA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 63° | 43° | 5.5" | 0.0" | 11 | 0 | 46° – 60° |
| February | 67° | 47° | 4.2" | 0.0" | 9 | 0 | 47° – 66° |
| March | 73° | 52° | 4.1" | 0.0" | 8 | 0 | 56° – 70° |
| April | 79° | 58° | 4.7" | 0.0" | 7 | 0 | 64° – 73° |
| May | 85° | 66° | 5.5" | 0.0" | 8 | 0 | 72° – 79° |
| June | 90° | 72° | 7.0" | 0.0" | 12 | 0 | 79° – 83° |
| July | 91° | 74° | 6.5" | 0.0" | 13 | 0 | 81° – 85° |
| August | 91° | 73° | 7.0" | 0.0" | 13 | 0 | 79° – 85° |
| September | 88° | 70° | 5.3" | 0.0" | 9 | 0 | 76° – 83° |
| October | 81° | 59° | 4.4" | 0.0" | 7 | 0 | 67° – 75° |
| November | 72° | 50° | 3.9" | 0.0" | 7 | 0 | 55° – 66° |
| December | 65° | 45° | 4.8" | 0.1" | 9 | 0 | 49° – 63° |
| Year | 79° | 59° | 62.9" | 0.1" | 113 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 47° to 66°. June is the most reliable, staying within 4°.
Where Napoleonville’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Napoleonville’s center.
- Snow: Donaldsonville 4 Sw, LA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Donaldsonville 4 Sw, LA, 9 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Napoleonville’s climate
What is the weather like in Napoleonville?
A typical July afternoon reaches 91°, a January night drops to 43°, and snow is almost unheard of. Milder January nights than 92% of U.S. towns; hotter July afternoons than 83% of U.S. towns.
How cold does it get in Napoleonville in winter?
January nights average 43°. About 16 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 46°.
How much snow does Napoleonville get?
About 0.1 inches in a normal winter at Donaldsonville 4 Sw, LA, so most winters see none.
How hot does it get in Napoleonville?
July, with a typical high of 91° and a low of 74°. About 80 days a year reach 90° (Donaldsonville 4 Sw, LA).
When is the first and last frost in Napoleonville?
In half of years the last spring frost (32°) comes by February 21 and the first fall frost by December 5, about 291 frost-free days, at Donaldsonville 4 Sw, LA.
What growing zone is Napoleonville in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 25°.
What is the best time of year to visit Napoleonville?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Napoleonville getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 81% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Napoleonville.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.