Hammond, Louisiana climate: Normal weather by month, frost dates and records
Hammond's normal year runs from 38°F January nights to 92°F July afternoons, with 64.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 19.3°C, January lows of 3°C, July highs of 33°C, 1,630 mm of precipitation a year.
- NOAA stationHammond (5 mi E)
- Station IDUSC00164030
- Location30.50°N 90.38°W
- Elevation35 ft (11 m)
- From the center5 miles
- Population23,426
On October 23, the normal high in Hammond is 78°F and the normal low 53°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hammond.
- Jan 62° 38°
- Feb 65° 42°
- Mar 72° 49°
- Apr 78° 55°
- May 85° 63°
- Jun 90° 69°
- Jul 92° 72°
- Aug 92° 71°
- Sep 88° 67°
- Oct 81° 56°
- Nov 70° 46°
- Dec 64° 41°
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 Hammond each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 38°F. The most precipitation falls in July (6.79 in), the least in October (4.10 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 62°F | 38°F | 49.9°F | 5.75 | 11 | <1 | 10 | 10 h 20 min |
| February | 65°F | 42°F | 53.5°F | 4.59 | 9 | <1 | 6 | 11 h 10 min |
| March | 72°F | 49°F | 60.0°F | 5.25 | 8 | <1 | 2 | 12 h |
| April | 78°F | 55°F | 66.2°F | 5.56 | 7 | <1 | <1 | 12 h 50 min |
| May | 85°F | 63°F | 73.5°F | 5.41 | 8 | 4 | <1 | 13 h 40 min |
| June | 90°F | 69°F | 79.4°F | 6.65 | 13 | 18 | <1 | 14 h 10 min |
| July | 92°F | 72°F | 81.5°F | 6.79 | 14 | 23 | <1 | 14 h |
| August | 92°F | 71°F | 81.4°F | 5.61 | 12 | 24 | <1 | 13 h 20 min |
| September | 88°F | 67°F | 77.5°F | 4.38 | 9 | 14 | <1 | 12 h 20 min |
| October | 81°F | 56°F | 68.1°F | 4.10 | 7 | 2 | <1 | 11 h 30 min |
| November | 70°F | 46°F | 58.0°F | 4.20 | 8 | <1 | 3 | 10 h 40 min |
| December | 64°F | 41°F | 52.1°F | 5.88 | 9 | <1 | 9 | 10 h 10 min |
| Year (annual) | 78°F | 56°F | 66.8°F | 64.17 | 116 | 86 | 31 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 3°C | 9.9°C | 146 mm |
| February | 18°C | 5°C | 11.9°C | 117 mm |
| March | 22°C | 9°C | 15.6°C | 133 mm |
| April | 25°C | 13°C | 19.0°C | 141 mm |
| May | 29°C | 17°C | 23.1°C | 137 mm |
| June | 32°C | 21°C | 26.3°C | 169 mm |
| July | 33°C | 22°C | 27.5°C | 172 mm |
| August | 33°C | 22°C | 27.4°C | 142 mm |
| September | 31°C | 19°C | 25.3°C | 111 mm |
| October | 27°C | 13°C | 20.1°C | 104 mm |
| November | 21°C | 8°C | 14.4°C | 107 mm |
| December | 18°C | 5°C | 11.2°C | 149 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Covington (16 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 USC00164030; 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 Hammond?
Normal highs sit between 65°F and 85°F in February, March, April, May, October and November. 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 USC00164030.
When is the last frost in Hammond?
In Hammond, the last spring frost (32°F) comes after March 8 in half of years and after March 31 in one year in ten; the first autumn frost comes before November 19 in half of years and before November 3 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 81 year in 10 after March 31; 9 in 10 after February 12
- First autumn frost, half of years before
- November 191 year in 10 before November 3; 9 in 10 before December 8
NOAA puts the median frost-free season at 257 days, and the season without a hard freeze (28°F) at 288 days.
A hard freeze (28°F) comes after February 21 in half of springs and before December 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hammond in zone 9a across its 2 ZIP code areas (9a in 70401, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Hammond's NOAA station is in zone 9a: the coldest night of a typical year reaches 21°F (20 complete years).
Frost dates for every NOAA station in Louisiana · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00164030; 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.
What hardiness zone is each Hammond ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Hammond's 2 ZIP code areas are all in zone 9a. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Hammond?
In a normal year in Hammond, 86 days a year reach 90°F (1 of them 100°F or more), 31 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 86a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 31a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
The highest temperature in this station's record (since 1981) is 105°F, on July 22, 2000; the lowest is 7°F, on January 12, 1982.
The wettest calendar year on that record is 1992, with 85.91 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00164030; records: ACIS (NOAA Regional Climate Centers), station USC00164030. Records use complete months only; a month missing more than three days is left out.
How sunny is Hammond?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hammond, 4.7 kWh per square metre a day. October is the sunniest month (83%) and February the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.9 |
| February | 69% | 3.5 |
| March | 75% | 4.6 |
| April | 79% | 5.7 |
| May | 81% | 6.3 |
| June | 79% | 6.1 |
| July | 78% | 5.8 |
| August | 79% | 5.5 |
| September | 82% | 5.1 |
| October | 83% | 4.4 |
| November | 80% | 3.4 |
| December | 71% | 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 Hammond need?
A normal year in Hammond brings 1,797 heating degree days, 67% fewer than the median U.S. place (5,373), and 2,467 cooling degree days, 2.7 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 6,460 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 474 | 6 |
| February | 332 | 11 |
| March | 194 | 41 |
| April | 73 | 107 |
| May | 9 | 272 |
| June | 0 | 434 |
| July | 0 | 511 |
| August | 0 | 508 |
| September | 2 | 378 |
| October | 60 | 156 |
| November | 242 | 31 |
| December | 412 | 12 |
| Year (annual) | 1,797 | 2,467 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00164030. 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 Hammond's climate compare?
Hammond is warmer than 29 of the other 64 places with their own NOAA record in Louisiana, and wetter than 50. Across the 7,247 U.S. stations with normals, its annual mean of 66.8°F is warmer than 92%.
In the Köppen classification computed from these normals, Hammond 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 Hammond share this climate record?
6 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.
- Ponchatoula, LA7,735 people · 6 mi SW
- Natalbany, LA2,837 people · 7 mi NW
- Killian, LA1,253 people · 16 mi SW
- Albany, LA1,247 people · 12 mi W
- Tickfaw, LA685 people · 8 mi NW
- Springfield, LA456 people · 11 mi SW
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 Hammond's climate
What is the coldest month in Hammond?
January, with a normal high of 62°F and a normal low of 38°F. The warmest is July (92°F by day, 72°F at night).
Does it snow in Hammond?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Hammond's NOAA station; the nearest record that keeps one, Covington (16 miles away), records 0 inches of snow in a normal year.
What is the rainiest month in Hammond?
July, with 6.79 in of precipitation in a normal year; the driest is October with 4.10 in.
What plant hardiness zone is Hammond in?
The USDA's 2023 map puts Hammond in zone 9a across its 2 ZIP code areas (9a in 70401, the largest). By the same method at Hammond's NOAA station, the coldest night of a typical year reaches 21°F (20 years, 1991-2020): zone 9a.
How late can frost come in Hammond?
In half of years the last 32°F night comes after March 8; in one year in ten it comes after March 31. Waiting until March 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Hammond in OctoberThis month day by day, its records and recent years
- Louisiana climateThe statewide normals and every place in the state
- Covington, LA16 miles from this station, 67.0°F a year
- Amite, LA17 miles from this station, 66.7°F a year
- Reserve, LA33 miles from this station, 69.1°F a year
- Slidell, LA35 miles from this station, 67.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made