Apex, NC frost dates
From NOAA weather station Apex (USC00310212), elevation 450 ft. The station is named for Apex, and its coordinates are 2.7 miles from the Census Bureau’s internal point for Apex town.
Summary
In the 1991–2020 record, the median last spring freeze (32°F) at Apex is Mar 27 and the median first fall freeze is Nov 8, for a typical freeze-free season of 227 days. In about 1 year in 10 the last spring freeze comes after Apr 10, and in about 1 year in 10 the first fall freeze arrives by Oct 26. The station averages 67 nights per year with a low of 32°F or colder.
Compared with the median of 187 North Carolina stations in this dataset, the median last freeze here is 5 days earlier than the state median (Apr 1), the median first freeze is 4 days later than the state median (Nov 4), and the growing season ranks #49 of 187 by length (longest = #1). The spread between the 90% and 10% spring dates is 33 days, a measure of how variable spring is here.
Freeze probability table
| Threshold | Last spring occurrence | First fall occurrence | Season length (days) 90% / 50% / 10% | ||||
|---|---|---|---|---|---|---|---|
| Early (90% chance of a later freeze) | Median (50%) | Cautious (10% chance of a later freeze) | Early (10% chance by then) | Median (50%) | Late (90% chance by then) | ||
| 36°F (light frost possible) | Mar 23 | Apr 7 | Apr 21 | Oct 17 | Oct 31 | Nov 11 | 186 / 205 / 224 |
| 32°F (freeze) | Mar 8 | Mar 27 | Apr 10 | Oct 26 | Nov 8 | Nov 24 | 206 / 227 / 251 |
| 28°F (hard freeze) | Feb 24 | Mar 15 | Mar 31 | Nov 5 | Nov 21 | Dec 12 | 230 / 253 / 282 |
Read the spring “Cautious” column as the safer planting date: only about 1 year in 10 has a freeze after it. NOAA computes these from daily minimum temperatures at the station; your yard can differ, especially in low spots or at a different elevation.
Planting calendar for Apex
Pick how much frost risk you accept. The calendar applies generic, extension-published timing rules to this station’s dates. See the rules and sources.
| Crop | Start seeds indoors | Plant outdoors (spring) | Latest fall planting (est.) | Days to harvest |
|---|
Fall estimates count back from the median first fall freeze (32°F for tender crops, 28°F hard freeze for cool-season crops) by the longer days-to-harvest figure. These are rough planning aids, not recommendations for any specific variety; check seed packets and your county extension office.
Towns that use this station as their nearest
Census places within 15 miles whose closest station in this dataset is Apex: Apex (3 mi), Cary (3 mi).
Nearby stations
- Cary, NC — 3 mi; median last freeze Mar 31, first freeze Nov 10
- New Hill, NC — 6 mi; median last freeze Apr 6, first freeze Nov 3
- Raleigh State Univ, NC — 8 mi; median last freeze Mar 28, first freeze Nov 8
- Raleigh 4 SW, NC — 9 mi; median last freeze Mar 28, first freeze Nov 9
- Chatham WTP, NC — 9 mi; median last freeze Apr 1, first freeze Nov 7
About this station’s data
- Station ID: USC00310212 · Latitude 35.7425, longitude -78.8369 · Elevation 137 m (450 ft)
- NOAA completeness flag: R — Representative: meets WMO standards for 10 or more years; gaps filled from surrounding stations. Years of data used: 25.
- Source file: USC00310212.csv (NOAA NCEI 1991–2020 annual/seasonal normals).
Raw values from the NOAA file (32°F)
| Field | Value |
|---|---|
ANN-TMIN-PRBLST-T32FP10 | 04/10 |
ANN-TMIN-PRBLST-T32FP50 | 03/27 |
ANN-TMIN-PRBLST-T32FP90 | 03/08 |
ANN-TMIN-PRBFST-T32FP10 | 10/26 |
ANN-TMIN-PRBFST-T32FP50 | 11/08 |
ANN-TMIN-PRBFST-T32FP90 | 11/24 |
ANN-TMIN-PRBGSL-T32FP10 | 251.0 |
ANN-TMIN-PRBGSL-T32FP50 | 227.0 |
ANN-TMIN-PRBGSL-T32FP90 | 206.0 |