Monument reaches 100° on about 22 days a year, more than 96% of U.S. towns
January mornings start at about 26°. Precipitation is light here, less than falls on 96% of U.S. towns. Since 1901–2000, the year has warmed by 1.4°, most of all in January. Keep the boiler serviced for the months from November to April, which average under 50°.
A year in Monument at a glance
Each month’s typical high and low, and what it brings.
What stands out about Monument’s climate
Compared with towns across the U.S., with Monument’s place in Oregon beside it.
What a year in Monument feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 139 frost-free days a year
In half of years the last 32° night comes by May 9 and the first by September 27. Frost and day counts come from NOAA’s station at Monument 2, OR, 0.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Monument’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 4°. 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 12 inches of rain a year
May is the wettest month and August the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Monument
90% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October 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 Monument 2, OR.
Living with Monument’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
139 frost-free days in zone 7a. The last frost comes by May 9 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 27.
Months with highs of 62–84° and lows of 40° or more: May, June and September.
Parks & trails →Of the yearly building losses FEMA expects in Monument from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Monument and similar climates
TownRatings has no climate map of the towns around Monument 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 Monument averaged 1.4° warmer than the 1900s. The biggest change is in January (+3.8°).
A bigger shift than in 54% 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 Monument compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Monument’s place among Oregon’s.
Monument weather by month
Highs, lows and precipitation from NOAA’s grid at Monument’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 45° | 26° | 1.2" | 28° – 40° |
| February | 50° | 27° | 0.9" | 31° – 46° |
| March | 58° | 31° | 1.1" | 40° – 50° |
| April | 64° | 34° | 1.2" | 44° – 56° |
| May | 73° | 41° | 1.5" | 51° – 63° |
| June | 81° | 47° | 1.1" | 59° – 72° |
| July | 92° | 51° | 0.4" | 61° – 76° |
| August | 91° | 50° | 0.4" | 66° – 75° |
| September | 82° | 42° | 0.4" | 58° – 66° |
| October | 67° | 34° | 1.0" | 45° – 57° |
| November | 53° | 30° | 1.2" | 35° – 48° |
| December | 44° | 25° | 1.2" | 28° – 38° |
| Year | 67° | 36° | 11.6" |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 61° to 76°. September is the most reliable, staying within 8°.
Where Monument’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 Monument’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Monument 2, OR, 0.2 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 Monument’s climate
What is the weather like in Monument?
A typical July afternoon reaches 92°, a January night drops to 26°. Milder January nights than 65% of U.S. towns; hotter July afternoons than 88% of U.S. towns.
How cold does it get in Monument in winter?
December nights average 25°. About 158 nights a year reach 32° or below and 2 reach 0° or below. In the coldest December of the last 30 years the month averaged 28°.
How hot does it get in Monument?
July, with a typical high of 92° and a low of 51°. About 71 days a year reach 90° and 22 reach 100° (Monument 2, OR).
When is the first and last frost in Monument?
In half of years the last spring frost (32°) comes by May 9 and the first fall frost by September 27, about 139 frost-free days, at Monument 2, OR.
What growing zone is Monument in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 4°.
What is the best time of year to visit Monument?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Monument getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 54% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Monument.
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.