Portland’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 91°, a January night drops to 49°, and snow is almost unheard of.
A year in Portland at a glance
Each month’s typical high and low, and what it brings.
What stands out about Portland’s climate
Compared with towns across the U.S., with Portland’s place in Texas beside it.
What a year in Portland feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze most winters
Frost and day counts come from NOAA’s station at Corpus Christi, TX, 13 miles from the town’s center, at about the same height.
The 2023 USDA map puts Portland’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 30°. 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 33 inches of rain a year
September is the wettest month and February the driest. Rain falls on about 79 days a year. Snow is rare: about 0.2" in a normal year at Corpus Christi, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Portland
18% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Corpus Christi, TX.
Living with Portland’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 9 winters in 10, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December. 1.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Portland from natural hazards, hurricanes are the largest share (47%); heat waves, cold waves, winter storms and ice storms together are 26%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Portland and its neighbors
Every town next door is within a degree of Portland in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Portland’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 |
|---|---|---|---|---|
| Portland, TX | 49° | 91° | 33" | 0.2" |
| Sierra Madre, CA | 43° | 90° | 28" | 0.0" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| St. Simons, GA | 43° | 91° | 49" | 0.0" |
| Leesburg, FL | 47° | 91° | 50" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Portland averaged 1.6° warmer than the 1900s. The biggest change is in February (+2.6°).
A bigger shift than in 65% 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 Portland compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Portland’s place among Texas’.
Portland weather by month
Highs, lows and precipitation from NOAA’s grid at Portland’s center; snow, wet days and snow on the ground from Corpus Christi, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 65° | 49° | 1.8" | 0.0" | 7 | 0 | 52° – 62° |
| February | 68° | 53° | 1.6" | 0.0" | 6 | 0 | 53° – 68° |
| March | 74° | 59° | 2.4" | 0.0" | 6 | 0 | 60° – 72° |
| April | 79° | 65° | 1.9" | 0.0" | 6 | 0 | 67° – 76° |
| May | 85° | 72° | 3.6" | 0.0" | 6 | 0 | 75° – 81° |
| June | 90° | 77° | 3.8" | 0.0" | 7 | 0 | 81° – 86° |
| July | 91° | 79° | 2.6" | 0.0" | 6 | 0 | 82° – 87° |
| August | 92° | 79° | 2.4" | 0.0" | 6 | 0 | 83° – 87° |
| September | 89° | 75° | 5.5" | 0.0" | 10 | 0 | 79° – 85° |
| October | 83° | 67° | 3.4" | 0.0" | 7 | 0 | 73° – 80° |
| November | 74° | 58° | 2.4" | 0.0" | 6 | 0 | 61° – 72° |
| December | 67° | 51° | 1.8" | 0.2" | 7 | 0 | 52° – 63° |
| Year | 80° | 65° | 33.2" | 0.2" | 79 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 53° to 68°. August is the most reliable, staying within 4°.
Where Portland’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 Portland’s center.
- Snow: Corpus Christi, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Corpus Christi, TX, 13 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 Portland’s climate
What is the weather like in Portland?
A typical July afternoon reaches 91°, a January night drops to 49°, and snow is almost unheard of. Milder January nights than 96% of U.S. towns; hotter July afternoons than 83% of U.S. towns.
How cold does it get in Portland in winter?
January nights average 49°. About 4 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 52°.
How much snow does Portland get?
About 0.2 inches in a normal winter at Corpus Christi, TX, so most winters see none.
How hot does it get in Portland?
July, with a typical high of 91° and a low of 79°. About 123 days a year reach 90° and 4 reach 100° (Corpus Christi, TX).
When is the first and last frost in Portland?
There is no reliable frost date: a 32° night comes in about 89% of winters at Corpus Christi, TX, so most years bring a freeze but some pass without one.
What growing zone is Portland in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 30°.
What is the best time of year to visit Portland?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Portland getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 65% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Portland.
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.