San Marcos, Texas · winter 2026-27

Chill hours in San Marcos this winter

Chill hours so far (45°F model)00 hours at or below 45°F since 1 November, to Nov 8. Same date last winter: 6. Station: San Marcos Muni Airport, 7.5 km away.
Last winter (2025-26)
504
1 Nov to 28 Feb
By this date last winter
6
1 Nov to Nov 8
Hours 32–45°F so far
0
the 0–45°F model leaves out freezing hours
Coldest month last winter
January
238 chill hours

Chill hours accumulated since 1 November

Hours at or below 45°F, running total. Grey: last winter; clay: this winter so far.

0200400600NovDecJanFeb2025-26: 504 h0 h so far
0200400600NovDecJanFeb2025-26: 504 h0 h so far
  • Winter 2026-27
  • Winter 2025-26
View as table
MonthChill hours (≤ 45°F)
November 202525
December 2025159
January 2026238
February 202682
Total504
Source: NOAA NCEI GHCN-Daily, station USW00012979; hours estimated from each day's high and low.

Fruit trees need a set number of cold hours in winter before they bloom well. Nurseries rate varieties by it: low-chill varieties need roughly 100 to 400 hours, many peaches and plums 500 to 900, and most apples and sweet cherries 800 to 1,200 or more. Your variety's rating is the number to compare with the 504 hours San Marcos had last winter.

Chill hours here are hours at or below 45°F, estimated hour by hour from the station's daily high and low. Checked against measured hourly air temperature at 39 NOAA reference stations last winter, the estimate was within 1.9% of the measured count at the median station. How it is checked.

Chill hours nearby

Each from a different station.

CityDistanceChill hours so farLast winter
New Braunfels, TX27 km0457
Austin, TX47 km0451
San Antonio, TX74 km0365
Round Rock, TX74 km0636
Taylor, TX92 km0681
Kerrville, TX117 km0595

Questions

How many chill hours has San Marcos had this winter?
0 hours at or below 45°F from 1 November to Nov 8, 2026, estimated from the daily highs and lows at the San Marcos Muni Airport station.
How many chill hours did San Marcos get last winter?
504 hours from 1 November to 28 February (2025-26).
Which chill model is this?
The simple 45°F model: every hour at or below 45°F counts. The 32 to 45°F count, which leaves out hours below freezing, is shown as well.

Data: Global Historical Climatology Network - Daily (GHCN-Daily), daily maximum and minimum temperature (NOAA National Centers for Environmental Information (NCEI)); GeoNames gazetteer (cities15000) (GeoNames).