How many chill hours has Grants Pass had this winter?

80 hours at or below 45°F from 1 November to Nov 7, 2026, estimated from the daily highs and lows at the Nws Medford Wfo station.

How many chill hours did Grants Pass get last winter?

1,599 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.

Grants Pass, Oregon · winter 2026-27

Chill hours in Grants Pass this winter

Chill hours so far (45°F model)8080 hours at or below 45°F since 1 November, to Nov 7. Same date last winter: 31. Station: Nws Medford Wfo, 37.5 km away.

Last winter (2025-26)

1,599

1 Nov to 28 Feb

By this date last winter

1 Nov to Nov 7

Hours 32–45°F so far

the 0–45°F model leaves out freezing hours

Coldest month last winter

January

520 chill hours

Chill hours accumulated since 1 November

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

Winter 2026-27
Winter 2025-26

View as table

Month	Chill hours (≤ 45°F)
November 2025	260
December 2025	488
January 2026	520
February 2026	331
Total	1,599

Source: NOAA NCEI GHCN-Daily, station USC00356152; 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 1,599 hours Grants Pass 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.

City	Distance	Chill hours so far	Last winter
Medford, OR	39 km	86	1,603
Roseburg, OR	86 km	64	1,357
Coos Bay, OR	126 km	49	987
Eugene, OR	180 km	64	1,615
Eureka, CA	195 km	37	634
Redding, CA	220 km	53	822

Questions

How many chill hours has Grants Pass had this winter?: 80 hours at or below 45°F from 1 November to Nov 7, 2026, estimated from the daily highs and lows at the Nws Medford Wfo station.
How many chill hours did Grants Pass get last winter?: 1,599 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).