New Roads, Louisiana climate: Normal weather by month, frost dates and records
New Roads's normal year runs from 42°F January nights to 92°F July afternoons, with 58.5 inches of precipitation and less than an inch of snow (0.1 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.4°C, January lows of 5°C, July highs of 34°C, 1,487 mm of precipitation a year.
- NOAA stationNew Roads (5 mi NE)
- Station IDUSC00166686
- Location30.73°N 91.37°W
- Elevation45 ft (14 m)
- From the center6 miles
- Population4,295
On October 23, the normal high in New Roads is 78°F and the normal low 57°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for New Roads.
- Jan 61° 42°
- Feb 65° 45°
- Mar 72° 51°
- Apr 79° 58°
- May 86° 66°
- Jun 91° 73°
- Jul 92° 75°
- Aug 92° 75°
- Sep 89° 71°
- Oct 81° 60°
- Nov 71° 50°
- Dec 63° 44°
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 New Roads each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 42°F. The most precipitation falls in January (6.53 in), the least in November (3.91 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 61°F | 42°F | 51.5°F | 6.53 | 9 | <1 | 7 | 10 h 20 min |
| February | 65°F | 45°F | 55.2°F | 5.19 | 8 | <1 | 3 | 11 h 10 min |
| March | 72°F | 51°F | 61.7°F | 4.49 | 8 | <1 | 1 | 12 h |
| April | 79°F | 58°F | 68.4°F | 5.07 | 7 | 1 | <1 | 12 h 50 min |
| May | 86°F | 66°F | 76.0°F | 5.21 | 8 | 8 | <1 | 13 h 40 min |
| June | 91°F | 73°F | 81.8°F | 5.55 | 10 | 18 | <1 | 14 h 10 min |
| July | 92°F | 75°F | 83.8°F | 4.62 | 11 | 24 | <1 | 14 h |
| August | 92°F | 75°F | 83.6°F | 4.36 | 10 | 23 | <1 | 13 h 20 min |
| September | 89°F | 71°F | 79.8°F | 4.06 | 7 | 14 | <1 | 12 h 20 min |
| October | 81°F | 60°F | 70.3°F | 4.21 | 6 | 2 | <1 | 11 h 30 min |
| November | 71°F | 50°F | 60.2°F | 3.91 | 6 | <1 | 2 | 10 h 40 min |
| December | 63°F | 44°F | 53.6°F | 5.34 | 9 | <1 | 6 | 10 h 10 min |
| Year (annual) | 79°F | 59°F | 68.8°F | 58.54 | 98 | 90 | 19 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 5°C | 10.8°C | 166 mm |
| February | 18°C | 7°C | 12.9°C | 132 mm |
| March | 22°C | 11°C | 16.5°C | 114 mm |
| April | 26°C | 14°C | 20.2°C | 129 mm |
| May | 30°C | 19°C | 24.4°C | 132 mm |
| June | 33°C | 23°C | 27.7°C | 141 mm |
| July | 34°C | 24°C | 28.8°C | 117 mm |
| August | 34°C | 24°C | 28.7°C | 111 mm |
| September | 32°C | 22°C | 26.6°C | 103 mm |
| October | 27°C | 16°C | 21.3°C | 107 mm |
| November | 22°C | 10°C | 15.7°C | 99 mm |
| December | 17°C | 7°C | 12.0°C | 136 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00166686; 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 New Roads?
Normal highs sit between 65°F and 85°F in February, March, April, October and November. Of those, October has the fewest days with rain (6).
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 USC00166686.
When is the last frost in New Roads?
In New Roads, the last spring frost (32°F) comes after February 19 in half of years and after March 14 in one year in ten; the first autumn frost comes before December 5 in half of years and before November 15 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
- February 191 year in 10 after March 14; 9 in 10 after January 21
- First autumn frost, half of years before
- December 51 year in 10 before November 15; 9 in 10 before January 4
NOAA puts the median frost-free season at 292 days, and the season without a hard freeze (28°F) at 330 days.
A hard freeze (28°F) comes after January 31 in half of springs and before December 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts New Roads in zone 9a in ZIP code 70760, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, New Roads's NOAA station is in zone 9a: the coldest night of a typical year reaches 23°F (24 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 USC00166686; 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 New Roads?
In a normal year in New Roads, 90 days a year reach 90°F (2 of them 100°F or more), 19 nights fall to 32°F or colder and 98 days bring measurable precipitation.
- Days at 90°F or more
- 90a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 19a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 98a normal year
The highest temperature in this station's record (since 1942) is 107°F, on June 2, 2011; the lowest is 8°F, on January 11, 1982.
The wettest calendar year on that record is 1983, with 80.16 in; the snowiest season is 1959–60, with 3.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00166686; records: ACIS (NOAA Regional Climate Centers), station USC00166686. Records use complete months only; a month missing more than three days is left out.
How sunny is New Roads?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around New Roads, 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 New Roads need?
A normal year in New Roads brings 1,522 heating degree days, 72% fewer than the median U.S. place (5,373), and 2,940 cooling degree days, 3.2 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,127 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 429 | 10 |
| February | 293 | 18 |
| March | 158 | 56 |
| April | 46 | 147 |
| May | 3 | 343 |
| June | 0 | 504 |
| July | 0 | 583 |
| August | 0 | 577 |
| September | 0 | 443 |
| October | 36 | 201 |
| November | 189 | 45 |
| December | 369 | 15 |
| Year (annual) | 1,522 | 2,940 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00166686. 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 New Roads been warmer than normal lately?
2025 averaged 70.0°F, 1.2°F above the 1991-2020 normal of 68.8°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.8°F | at normal | 74.70 |
| 2023 | 70.9°F | +2.1°F | 46.03 |
| 2024 | 70.4°F | +1.6°F | 66.78 |
| 2025 | 70.0°F | +1.2°F | 60.77 |
Over 50 complete years from 1944 to 2025, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00166686; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does New Roads's climate compare?
New Roads is warmer than 48 of the other 64 places with their own NOAA record in Louisiana, and wetter than 21. Across the 7,247 U.S. stations with normals, its annual mean of 68.8°F is warmer than 94%.
In the Köppen classification computed from these normals, New Roads 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 New Roads share this climate record?
5 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.
- Ventress, LA1,325 people · 5 mi SW
- Livonia, LA1,161 people · 16 mi SW
- Fordoche, LA863 people · 18 mi SW
- Melville, LA740 people · 23 mi W
- Morganza, LA501 people · 13 mi W
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 New Roads's climate
What is the coldest month in New Roads?
January, with a normal high of 61°F and a normal low of 42°F. The warmest is July (92°F by day, 75°F at night).
Does it snow in New Roads?
Rarely: NOAA's normal is 0.1 inch a year.
What is the rainiest month in New Roads?
January, with 6.53 in of precipitation in a normal year; the driest is November with 3.91 in.
What plant hardiness zone is New Roads in?
The USDA's 2023 map puts New Roads in zone 9a in ZIP code 70760, the nearest ZIP area. By the same method at New Roads's NOAA station, the coldest night of a typical year reaches 23°F (24 years, 1991-2020): zone 9a.
How late can frost come in New Roads?
In half of years the last 32°F night comes after February 19; in one year in ten it comes after March 14. Waiting until March 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Louisiana climateThe statewide normals and every place in the state
- St. Francisville, LA4 miles from this station, 66.2°F a year
- Baton Rouge, LA19 miles from this station, 68.5°F a year
- Brusly, LA24 miles from this station, 67.3°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