Photo: Ktkvtsh · CC BY 4.0Delta is among the wettest of U.S. towns: 57 inches of precipitation a year
Nights in January average 37°. Its July heat outdoes that of 88% of U.S. towns. Warming shows here too: 0.9° more than in 1901–2000, led by February. Seedlings are safe outdoors from about March 3, with the first autumn frost due around November 11.
A year in Delta at a glance
Each month’s typical high and low, and what it brings.
What stands out about Delta’s climate
Compared with towns across the U.S., with Delta’s place in Louisiana beside it.
What a year in Delta feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 254 frost-free days a year
In half of years the last 32° night comes by March 3 and the first by November 11. Frost and day counts come from NOAA’s station at Tallulah Vicksburg Airport, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Delta’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 19°. 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 57 inches of rain a year
April is the wettest month and September the driest. Rain falls on about 95 days a year. Snow is rare: about 0.1" in a normal year at Vicksburg City, MS, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Delta
45% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Tallulah Vicksburg Airport.
Living with Delta’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
254 frost-free days in zone 8b. The last frost comes by Mar 3 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 11.
Months with highs of 62–84° and lows of 40° or more: February, March, April, May, October and November. 6.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Delta from natural hazards, river flooding is the largest share (27%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Delta and similar climates
TownRatings has no climate map of the towns around Delta yet.
Climates most like Delta’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 |
|---|---|---|---|---|
| Delta, LA | 37° | 92° | 57" | 0.1" |
| Jasper, TX | 39° | 93° | 57" | 0.1" |
| Ozark, AL | 38° | 91° | 56" | 0.0" |
| Marianna, FL | 40° | 92° | 55" | 0.0" |
| Paradise, CA | 40° | 93° | 57" | 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 Delta averaged 0.9° warmer than the 1900s. The biggest change is in February (+1.5°).
A smaller shift than in 86% 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 Delta compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Delta’s place among Louisiana’s.
Delta weather by month
Highs, lows and precipitation from NOAA’s grid at Delta’s center; snow, wet days and snow on the ground from Vicksburg City, MS. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 58° | 37° | 5.7" | 0.0" | 10 | 0 | 42° – 55° |
| February | 62° | 41° | 5.3" | 0.1" | 10 | 0 | 42° – 61° |
| March | 70° | 47° | 5.1" | 0.0" | 8 | 0 | 52° – 67° |
| April | 77° | 54° | 6.0" | 0.0" | 8 | 0 | 60° – 70° |
| May | 84° | 62° | 4.5" | 0.0" | 8 | 0 | 70° – 77° |
| June | 90° | 69° | 4.2" | 0.0" | 8 | 0 | 77° – 84° |
| July | 92° | 72° | 4.2" | 0.0" | 9 | 0 | 79° – 85° |
| August | 92° | 71° | 4.5" | 0.0" | 8 | 0 | 77° – 86° |
| September | 88° | 66° | 3.4" | 0.0" | 5 | 0 | 74° – 82° |
| October | 79° | 54° | 4.1" | 0.0" | 6 | 0 | 62° – 73° |
| November | 68° | 45° | 4.3" | 0.0" | 7 | 0 | 51° – 62° |
| December | 60° | 39° | 5.6" | 0.0" | 8 | 0 | 40° – 59° |
| Year | 77° | 55° | 56.9" | 0.1" | 95 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 40° to 59°. July is the most reliable, staying within 6°.
Where Delta’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 Delta’s center.
- Snow: Vicksburg City, MS.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Tallulah Vicksburg Airport, 5 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 Delta’s climate
What is the weather like in Delta?
A typical July afternoon reaches 92°, a January night drops to 37°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; hotter July afternoons than 88% of U.S. towns.
How cold does it get in Delta in winter?
January nights average 37°. About 39 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 42°.
How much snow does Delta get?
About 0.1 inches in a normal winter at Vicksburg City, MS, so most winters see none.
How hot does it get in Delta?
July, with a typical high of 92° and a low of 72°. About 93 days a year reach 90° and 4 reach 100° (Tallulah Vicksburg Airport).
When is the first and last frost in Delta?
In half of years the last spring frost (32°) comes by March 3 and the first fall frost by November 11, about 254 frost-free days, at Tallulah Vicksburg Airport.
What growing zone is Delta in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 19°.
What is the best time of year to visit Delta?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Delta getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 86% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Delta.
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.