Photo: Gerry Dincher · CC BY-SA 2.0Afternoon heat in Siler City beats that of 74% of U.S. towns
In January the night’s low is typically 30°. Winters are mild: January nights here are milder than in 73% of U.S. towns. Warming shows here too: 1.1° more than in 1901–2000, led by December. The frost-free window for a garden runs roughly March 31 to November 4.
A year in Siler City at a glance
Each month’s typical high and low, and what it brings.
What stands out about Siler City’s climate
Compared with towns across the U.S., with Siler City’s place in North Carolina beside it.
What a year in Siler City feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 220 frost-free days a year
In half of years the last 32° night comes by March 31 and the first by November 4. Frost and day counts come from NOAA’s station at Siler City 2 N, NC, 2.4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Siler City’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 11°. 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 2 inches of snow a winter
Snow, measured at Siler City 2 N, NC, falls mostly in March. Precipitation (rain plus melted snow) adds up to 46 inches a year; September is the wettest month and February the driest. Rain or snow falls on about 115 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Siler City
70% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Siler City 2 N, NC.
Living with Siler City’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
220 frost-free days in zone 8a. The last frost comes by Mar 31 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 4.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October. 0.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Siler City from natural hazards, river flooding is the largest share (61%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Siler City and similar climates
TownRatings has no climate map of the towns around Siler City yet.
Climates most like Siler City’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 |
|---|---|---|---|---|
| Siler City, NC | 30° | 89° | 46" | 1.5" |
| Newport News, VA | 32° | 89° | 48" | 2.7" |
| Newport, TN | 28° | 88° | 47" | 3.3" |
| Powdersville, SC | 33° | 90° | 49" | 1.4" |
| Rockmart, GA | 32° | 90° | 50" | 0.7" |
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 Siler City averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.5°).
A smaller shift than in 73% 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 Siler City compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Siler City’s place among North Carolina’s.
Siler City weather by month
Highs, lows and precipitation from NOAA’s grid at Siler City’s center; snow, wet days and snow on the ground from Siler City 2 N, NC. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 51° | 30° | 3.8" | 0.4" | 10 | 0 | 35° – 47° |
| February | 55° | 33° | 3.1" | 0.1" | 10 | 0 | 34° – 51° |
| March | 63° | 39° | 4.1" | 0.6" | 11 | 0 | 44° – 59° |
| April | 72° | 47° | 3.7" | 0.0" | 10 | 0 | 55° – 64° |
| May | 79° | 56° | 3.6" | 0.0" | 10 | 0 | 63° – 73° |
| June | 86° | 64° | 4.0" | 0.0" | 10 | 0 | 71° – 79° |
| July | 89° | 69° | 4.5" | 0.0" | 11 | 0 | 75° – 82° |
| August | 87° | 67° | 4.3" | 0.0" | 10 | 0 | 74° – 82° |
| September | 81° | 60° | 5.0" | 0.0" | 9 | 0 | 68° – 76° |
| October | 72° | 49° | 3.3" | 0.0" | 8 | 0 | 57° – 65° |
| November | 62° | 38° | 3.4" | 0.0" | 8 | 0 | 45° – 56° |
| December | 54° | 33° | 3.6" | 0.4" | 10 | 0 | 34° – 54° |
| Year | 71° | 49° | 46.3" | 1.5" | 115 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 34° to 54°. July is the most reliable, staying within 7°.
Where Siler City’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 Siler City’s center.
- Snow: Siler City 2 N, NC.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Siler City 2 N, NC, 2.4 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 Siler City’s climate
What is the weather like in Siler City?
A typical July afternoon reaches 89°, a January night drops to 30°, and about 2 inches of snow falls in a normal winter. Milder January nights than 73% of U.S. towns; hotter July afternoons than 74% of U.S. towns.
How cold does it get in Siler City in winter?
January nights average 30°. About 73 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 35°.
How much snow does Siler City get?
About 1.5 inches in a normal winter at Siler City 2 N, NC, most of it in March, with snow on the ground about 0 days a year.
How hot does it get in Siler City?
July, with a typical high of 89° and a low of 69°. About 35 days a year reach 90° (Siler City 2 N, NC).
When is the first and last frost in Siler City?
In half of years the last spring frost (32°) comes by March 31 and the first fall frost by November 4, about 220 frost-free days, at Siler City 2 N, NC.
What growing zone is Siler City in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 11°.
What is the best time of year to visit Siler City?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Siler City getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 73% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Siler City.
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.