Photo: Oakshade at English Wikipedia · CC BY 3.0Jacksonville reaches 100° on about 11 days a year, more than 91% of U.S. towns
A typical July afternoon reaches 89°, a January night drops to 33°, and about 4 inches of snow falls in a normal winter.
A year in Jacksonville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jacksonville’s climate
Compared with towns across the U.S., with Jacksonville’s place in Oregon beside it.
What a year in Jacksonville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 204 frost-free days a year
In half of years the last 32° night comes by April 8 and the first by October 29. Frost and day counts come from NOAA’s station at Medford Rogue Vly Airport, 7 miles from the town’s center, 430 ft lower.
The 2023 USDA map puts Jacksonville’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 16°. 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 4 inches of snow a winter
Snow, measured at Buncom 1 Nne, OR, falls mostly in January. Precipitation (rain plus melted snow) adds up to 26 inches a year; December is the wettest month and August the driest. Rain or snow falls on about 107 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jacksonville
82% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Medford Rogue Vly Airport.
Living with Jacksonville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
204 frost-free days in zone 8b. The last frost comes by Apr 8 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 29.
Months with highs of 62–84° and lows of 40° or more: May, June, September and October. 11 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jacksonville from natural hazards, river flooding is the largest share (42%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jacksonville and similar climates
TownRatings has no climate map of the towns around Jacksonville yet.
Climates most like Jacksonville’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 |
|---|---|---|---|---|
| Jacksonville, OR | 33° | 89° | 26" | 3.6" |
| Walla Walla, WA | 30° | 91° | 16" | 9.0" |
| St. Helena, CA | 38° | 89° | 32" | 0.0" |
| Alpine, TX | 30° | 90° | 15" | 2.2" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 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 Jacksonville averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.7°).
A bigger shift than in 63% 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 Jacksonville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jacksonville’s place among Oregon’s.
Jacksonville weather by month
Highs, lows and precipitation from NOAA’s grid at Jacksonville’s center; snow, wet days and snow on the ground from Buncom 1 Nne, OR. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 49° | 33° | 3.9" | 1.2" | 13 | 1 | 37° – 46° |
| February | 53° | 34° | 2.9" | 0.8" | 12 | 1 | 37° – 49° |
| March | 57° | 36° | 2.8" | 0.6" | 14 | 0 | 42° – 52° |
| April | 62° | 39° | 2.2" | 0.1" | 13 | 0 | 46° – 55° |
| May | 71° | 44° | 1.7" | 0.0" | 9 | 0 | 52° – 65° |
| June | 79° | 49° | 0.9" | 0.0" | 5 | 0 | 60° – 71° |
| July | 89° | 57° | 0.4" | 0.0" | 2 | 0 | 64° – 77° |
| August | 89° | 56° | 0.3" | 0.0" | 2 | 0 | 68° – 75° |
| September | 82° | 50° | 0.5" | 0.0" | 3 | 0 | 63° – 69° |
| October | 69° | 42° | 1.7" | 0.0" | 7 | 0 | 51° – 60° |
| November | 54° | 37° | 3.4" | 0.2" | 13 | 0 | 38° – 50° |
| December | 46° | 33° | 4.9" | 0.7" | 15 | 1 | 34° – 45° |
| Year | 67° | 42° | 25.6" | 3.6" | 107 | 3 |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 64° to 77°. September is the most reliable, staying within 6°.
Where Jacksonville’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 Jacksonville’s center.
- Snow: Buncom 1 Nne, OR.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Medford Rogue Vly Airport, 7 miles from the town’s center, 430 ft lower; 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 Jacksonville’s climate
What is the weather like in Jacksonville?
A typical July afternoon reaches 89°, a January night drops to 33°, and about 4 inches of snow falls in a normal winter. Milder January nights than 76% of U.S. towns; hotter July afternoons than 72% of U.S. towns.
How cold does it get in Jacksonville in winter?
January nights average 33°. About 64 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 37°.
How much snow does Jacksonville get?
About 3.6 inches in a normal winter at Buncom 1 Nne, OR, most of it in January, with snow on the ground about 3 days a year.
How hot does it get in Jacksonville?
July, with a typical high of 89° and a low of 57°. About 61 days a year reach 90° and 11 reach 100° (Medford Rogue Vly Airport).
When is the first and last frost in Jacksonville?
In half of years the last spring frost (32°) comes by April 8 and the first fall frost by October 29, about 204 frost-free days, at Medford Rogue Vly Airport.
What growing zone is Jacksonville in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 16°.
What is the best time of year to visit Jacksonville?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jacksonville getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 63% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jacksonville.
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.