Photo: King of Hearts · CC BY-SA 4.0Oak Park reaches 100° on about 14 days a year, more than 93% of U.S. towns
A typical July afternoon reaches 87°, a January night drops to 46°, and snow is almost unheard of.
A year in Oak Park at a glance
Each month’s typical high and low, and what it brings.
What stands out about Oak Park’s climate
Compared with towns across the U.S., with Oak Park’s place in California beside it.
What a year in Oak Park feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 14 days a year reach 100°
And 76 days reach 90°. Frost and day counts come from NOAA’s station at Northridge Cal State, CA, 14 miles from the town’s center, 350 ft lower.
The 2023 USDA map puts Oak Park’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 35°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 17 inches of rain a year
February is the wettest month and August the driest. Rain falls on about 34 days a year. Snow is rare: about 0.0" in a normal year at Topanga Patrol Fc-6, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Oak Park
43% 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 Northridge Cal State, CA.
Living with Oak Park’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 1 winter in 5, so the growing year is set by heat, not cold: 14 days at 100° make midsummer the hard season for gardens.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, October, November and December. 23 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Oak Park from natural hazards, river flooding is the largest share (49%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Oak Park and its neighbors
Every town next door is within a degree of Oak Park in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Oak Park’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 |
|---|---|---|---|---|
| Oak Park, CA | 46° | 87° | 17" | 0.0" |
| Port Isabel, TX | 52° | 92° | 26" | 0.2" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 0.7" |
| Ewa Beach, HI | 62° | 87° | 17" | 0.0" |
| Green, OR | 37° | 86° | 32" | 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 Oak Park averaged 2.4° warmer than the 1900s. The biggest change is in January (+3.3°).
A bigger shift than in all but 113 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 Oak Park compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Oak Park’s place among California’s.
Oak Park weather by month
Highs, lows and precipitation from NOAA’s grid at Oak Park’s center; snow, wet days and snow on the ground from Topanga Patrol Fc-6, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 66° | 46° | 3.8" | 0.0" | 6 | 0 | 52° – 62° |
| February | 65° | 45° | 4.1" | 0.0" | 7 | 0 | 49° – 63° |
| March | 68° | 46° | 2.7" | 0.0" | 5 | 0 | 50° – 65° |
| April | 72° | 48° | 0.8" | 0.0" | 2 | 0 | 56° – 63° |
| May | 75° | 52° | 0.4" | 0.0" | 1 | 0 | 58° – 70° |
| June | 81° | 56° | 0.1" | 0.0" | 1 | 0 | 64° – 72° |
| July | 87° | 61° | 0.0" | 0.0" | 0 | 0 | 71° – 80° |
| August | 89° | 62° | 0.0" | 0.0" | 0 | 0 | 72° – 79° |
| September | 86° | 61° | 0.1" | 0.0" | 0 | 0 | 70° – 78° |
| October | 79° | 56° | 0.6" | 0.0" | 3 | 0 | 64° – 74° |
| November | 72° | 50° | 1.1" | 0.0" | 2 | 0 | 55° – 65° |
| December | 66° | 45° | 3.1" | 0.0" | 6 | 0 | 51° – 61° |
| Year | 76° | 52° | 16.8" | 0.0" | 34 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 50° to 65°. August is the most reliable, staying within 7°.
Where Oak Park’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 Oak Park’s center.
- Snow: Topanga Patrol Fc-6, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Northridge Cal State, CA, 14 miles from the town’s center, 350 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 Oak Park’s climate
What is the weather like in Oak Park?
A typical July afternoon reaches 87°, a January night drops to 46°, and snow is almost unheard of. Milder January nights than 94% of U.S. towns; hotter July afternoons than 62% of U.S. towns.
How cold does it get in Oak Park in winter?
February nights average 45°. A night at 32° or below comes in only some winters (0.6 a year on average). In the coldest February of the last 30 years the month averaged 49°.
How much snow does Oak Park get?
About 0.0 inches in a normal winter at Topanga Patrol Fc-6, CA, so most winters see none.
How hot does it get in Oak Park?
July, with a typical high of 87° and a low of 61°. About 76 days a year reach 90° and 14 reach 100° (Northridge Cal State, CA).
When is the first and last frost in Oak Park?
Most years have no frost at all: a 32° night comes in about 18% of winters at Northridge Cal State, CA, usually in December or January.
What growing zone is Oak Park in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 35°.
What is the best time of year to visit Oak Park?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Oak Park getting warmer?
Yes: 1991–2020 averaged 2.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than all but 113 U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Oak Park.
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.