Siler City, North Carolina climate: Normal weather by month, frost dates and records
Siler City's normal year runs from 30°F January nights to 89°F July afternoons, with 45.9 inches of precipitation and 2 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.2°C, January lows of −1°C, July highs of 31°C, 1,166 mm of precipitation a year.
- NOAA stationSiler City (2 mi N)
- Station IDUSC00317924
- Location35.76°N 79.46°W
- Elevation610 ft (186 m)
- From the center2 miles
- Population8,087
On October 22, the normal high in Siler City is 69°F and the normal low 46°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Siler City.
- Jan 50° 30°
- Feb 54° 32°
- Mar 62° 39°
- Apr 71° 47°
- May 78° 56°
- Jun 85° 65°
- Jul 89° 69°
- Aug 87° 67°
- Sep 81° 61°
- Oct 71° 48°
- Nov 61° 38°
- Dec 53° 33°
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 Siler City each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 30°F. The most precipitation falls in September (5.05 in), the least in February (3.23 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 50°F | 30°F | 40.0°F | 3.85 | 0.4 | 10 | <1 | 20 | 10 h |
| February | 54°F | 32°F | 43.2°F | 3.23 | 0.1 | 10 | <1 | 16 | 10 h 50 min |
| March | 62°F | 39°F | 50.3°F | 4.22 | 0.6 | 11 | <1 | 9 | 11 h 50 min |
| April | 71°F | 47°F | 59.0°F | 3.85 | 0.0 | 10 | <1 | 1 | 13 h |
| May | 78°F | 56°F | 67.0°F | 3.63 | 0.0 | 10 | 1 | <1 | 14 h |
| June | 85°F | 65°F | 74.8°F | 3.74 | 0.0 | 10 | 8 | <1 | 14 h 30 min |
| July | 89°F | 69°F | 78.6°F | 3.79 | 0.0 | 11 | 13 | <1 | 14 h 20 min |
| August | 87°F | 67°F | 76.9°F | 4.03 | 0.0 | 10 | 9 | <1 | 13 h 30 min |
| September | 81°F | 61°F | 70.7°F | 5.05 | 0.0 | 9 | 3 | <1 | 12 h 30 min |
| October | 71°F | 48°F | 59.7°F | 3.40 | 0.0 | 8 | <1 | 1 | 11 h 20 min |
| November | 61°F | 38°F | 49.7°F | 3.47 | 0.0 | 8 | <1 | 9 | 10 h 20 min |
| December | 53°F | 33°F | 43.0°F | 3.63 | 0.4 | 10 | <1 | 17 | 9 h 50 min |
| Year (annual) | 70°F | 49°F | 59.4°F | 45.89 | 1.5 | 115 | 35 | 73 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | −1°C | 4.4°C | 98 mm | 1 cm |
| February | 12°C | 0°C | 6.2°C | 82 mm | 0 cm |
| March | 17°C | 4°C | 10.2°C | 107 mm | 2 cm |
| April | 22°C | 8°C | 15.0°C | 98 mm | 0 cm |
| May | 25°C | 13°C | 19.4°C | 92 mm | 0 cm |
| June | 29°C | 18°C | 23.8°C | 95 mm | 0 cm |
| July | 31°C | 20°C | 25.9°C | 96 mm | 0 cm |
| August | 30°C | 19°C | 24.9°C | 102 mm | 0 cm |
| September | 27°C | 16°C | 21.5°C | 128 mm | 0 cm |
| October | 22°C | 9°C | 15.4°C | 86 mm | 0 cm |
| November | 16°C | 3°C | 9.8°C | 88 mm | 0 cm |
| December | 12°C | 1°C | 6.1°C | 92 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00317924; 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 Siler City?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October has the fewest days with rain (8).
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 USC00317924.
When is the last frost in Siler City?
In Siler City, the last spring frost (32°F) comes after March 31 in half of years and after April 13 in one year in ten; the first autumn frost comes before November 4 in half of years and before October 23 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 311 year in 10 after April 13; 9 in 10 after March 14
- First autumn frost, half of years before
- November 41 year in 10 before October 23; 9 in 10 before November 20
NOAA puts the median frost-free season at 220 days, and the season without a hard freeze (28°F) at 245 days.
A hard freeze (28°F) comes after March 17 in half of springs and before November 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Siler City in zone 8a in ZIP code 27344, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Siler City's NOAA station is in zone 8a: the coldest night of a typical year reaches 11°F (23 complete years).
Frost dates for every NOAA station in North Carolina · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00317924; 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 Siler City?
In a normal year in Siler City, 35 days a year reach 90°F (1 of them 100°F or more), 73 nights fall to 32°F or colder and 115 days bring measurable precipitation.
- Days at 90°F or more
- 35a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 73a normal year
- Days that stay below freezing
- 4high of 32°F or less
- Days with 0.01 inch of precipitation
- 115a normal year
- Days with 1 inch of snow or more
- fewer than 1a normal year
The highest temperature in this station's record (since 1916) is 107°F, on July 29, 1952; the lowest is −11°F, on January 21, 1985.
The wettest calendar year on that record is 1989, with 63.76 in; the snowiest season is 1978–79, with 23.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00317924; records: ACIS (NOAA Regional Climate Centers), station USC00317924. Records use complete months only; a month missing more than three days is left out.
How sunny is Siler City?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Siler City, 4.4 kWh per square metre a day. June is the sunniest month (81%) and February the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.6 |
| February | 72% | 3.3 |
| March | 73% | 4.3 |
| April | 77% | 5.5 |
| May | 77% | 6.0 |
| June | 81% | 6.4 |
| July | 80% | 6.1 |
| August | 79% | 5.5 |
| September | 77% | 4.7 |
| October | 77% | 3.7 |
| November | 78% | 2.9 |
| December | 73% | 2.3 |
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 Siler City need?
A normal year in Siler City brings 3,504 heating degree days, 35% fewer than the median U.S. place (5,373), and 1,498 cooling degree days, 65% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,563 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 775 | 0 |
| February | 611 | 1 |
| March | 464 | 7 |
| April | 217 | 39 |
| May | 64 | 126 |
| June | 6 | 298 |
| July | 0 | 422 |
| August | 0 | 369 |
| September | 23 | 194 |
| October | 200 | 37 |
| November | 461 | 4 |
| December | 682 | 1 |
| Year (annual) | 3,504 | 1,498 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00317924. 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 Siler City been warmer than normal lately?
Over 73 complete years from 1917 to 2016, the station's annual mean temperature rose at a fitted 1.2°F per century (+0.07°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Siler City's climate compare?
Siler City is warmer than 59 of the other 130 places with their own NOAA record in North Carolina, and wetter than 16. Across the 7,247 U.S. stations with normals, its annual mean of 59.4°F is warmer than 73%.
In the Köppen classification computed from these normals, Siler City 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 Siler City share this climate record?
4 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.
- Liberty, NC2,715 people · 9 mi NW
- Staley, NC408 people · 6 mi NW
- Bennett, NC273 people · 13 mi S
- Goldston, NC256 people · 14 mi SE
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 Siler City's climate
What is the coldest month in Siler City?
January, with a normal high of 50°F and a normal low of 30°F. The warmest is July (89°F by day, 69°F at night).
Does it snow in Siler City?
Yes: 2 inches in a normal year, falling on 0 days with 0.1 inch or more, the most in March (0.6 inches).
What is the rainiest month in Siler City?
September, with 5.05 in of precipitation in a normal year; the driest is February with 3.23 in.
What plant hardiness zone is Siler City in?
The USDA's 2023 map puts Siler City in zone 8a in ZIP code 27344, the nearest ZIP area. By the same method at Siler City's NOAA station, the coldest night of a typical year reaches 11°F (23 years, 1991-2020): zone 8a.
How late can frost come in Siler City?
In half of years the last 32°F night comes after March 31; in one year in ten it comes after April 13. Waiting until April 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- North Carolina climateThe statewide normals and every place in the state
- Cane Creek Reservoir, NC18 miles from this station, 58.6°F a year
- Randleman, NC19 miles from this station, 58.7°F a year
- Burlington, NC20 miles from this station, 60.7°F a year
- Asheboro, NC21 miles from this station, 59.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made