Photo: Tedder · CC BY 3.0Nights stay kind in Glendale each January, milder than in 79% of U.S. towns
On a normal July day the thermometer tops out near 83°. In July, afternoons here are cooler than in 75% of U.S. towns. Since 1901–2000, the year has warmed by 1.7°, most of all in January. Radiators earn their keep from November to April, the months that average under 50°.
A year in Glendale at a glance
Each month’s typical high and low, and what it brings.
What stands out about Glendale’s climate
Compared with towns across the U.S., with Glendale’s place in Oregon beside it.
What a year in Glendale feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 221 frost-free days a year
In half of years the last 32° night comes by March 31 and the first by November 6. Frost and day counts come from Riddle, OR, 15 miles away.
The 2023 USDA map puts Glendale’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 45 inches of rain a year
December is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Glendale
85% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Riddle, OR.
Living with Glendale’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
221 frost-free days in zone 8b. The last frost comes by Mar 31 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 6.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Glendale from natural hazards, wildfire is the largest share (46%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Glendale and similar climates
TownRatings has no climate map of the towns around Glendale yet.
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 Glendale averaged 1.7° warmer than the 1900s. The biggest change is in January (+3.0°).
A bigger shift than in 69% 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 Glendale compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Glendale’s place among Oregon’s.
Glendale weather by month
Highs, lows and precipitation from NOAA’s grid at Glendale’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 46° | 34° | 7.3" | 34° – 47° |
| February | 49° | 34° | 5.6" | 34° – 48° |
| March | 54° | 35° | 5.4" | 39° – 51° |
| April | 58° | 38° | 3.5" | 43° – 54° |
| May | 67° | 43° | 2.3" | 48° – 63° |
| June | 73° | 47° | 1.1" | 56° – 68° |
| July | 83° | 54° | 0.3" | 60° – 72° |
| August | 83° | 53° | 0.4" | 64° – 73° |
| September | 77° | 49° | 1.0" | 58° – 68° |
| October | 65° | 42° | 3.1" | 49° – 59° |
| November | 51° | 37° | 6.3" | 36° – 49° |
| December | 44° | 33° | 8.8" | 35° – 43° |
| Year | 62° | 42° | 45.0" |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 48° to 63°. December is the most reliable, staying within 8°.
Where Glendale’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 Glendale’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Riddle, OR, 15 miles from the town’s center, 740 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- 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 Glendale’s climate
What is the weather like in Glendale?
A typical July afternoon reaches 83°, a January night drops to 34°. Milder January nights than 79% of U.S. towns; cooler July afternoons than 75% of U.S. towns.
How cold does it get in Glendale in winter?
December nights average 33°. About 33 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 35°.
How hot does it get in Glendale?
July, with a typical high of 83° and a low of 54°. About 35 days a year reach 90° and 3 reach 100° (Riddle, OR).
When is the first and last frost in Glendale?
In half of years the last spring frost (32°) comes by March 31 and the first fall frost by November 6, about 221 frost-free days, at Riddle, OR.
What growing zone is Glendale 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 Glendale?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Glendale getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Glendale.
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.