Photo: Sharon Mollerus · CC BY 2.0Manchester has some of the coolest summers among U.S. towns
Nights in January average 43°. Rain follows the seasons: December brings about 178 times as much as July. In January, nights here are milder than in 92% of U.S. towns. Comfortable outdoor weather lasts from June to October, with highs of 63–65°.
A year in Manchester at a glance
Each month’s typical high and low, and what it brings.
What stands out about Manchester’s climate
Compared with towns across the U.S., with Manchester’s place in California beside it.
What a year in Manchester feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 40 inches of rain a year
December is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Living with Manchester’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a.
Months with highs of 62–84° and lows of 40° or more: June, July, August, September and October. 1.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Manchester from natural hazards, earthquakes are the largest share (52%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Manchester and similar climates
TownRatings has no climate map of the towns around Manchester 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 Manchester averaged 0.9° warmer than the 1900s. The biggest change is in January (+1.4°).
A smaller shift than in 82% 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 Manchester compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Manchester’s place among California’s.
Manchester weather by month
Highs, lows and precipitation from NOAA’s grid at Manchester’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 57° | 43° | 7.5" | 47° – 55° |
| February | 58° | 43° | 6.3" | 45° – 56° |
| March | 58° | 44° | 5.9" | 46° – 57° |
| April | 59° | 45° | 3.0" | 48° – 56° |
| May | 61° | 48° | 1.4" | 49° – 59° |
| June | 63° | 50° | 0.4" | 54° – 61° |
| July | 65° | 51° | 0.1" | 55° – 61° |
| August | 65° | 52° | 0.1" | 56° – 62° |
| September | 65° | 51° | 0.3" | 55° – 61° |
| October | 64° | 48° | 2.0" | 52° – 63° |
| November | 60° | 45° | 4.6" | 46° – 56° |
| December | 57° | 42° | 8.9" | 47° – 54° |
| Year | 61° | 47° | 40.2" |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 46° to 57°. July is the most reliable, staying within 6°.
Where Manchester’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 Manchester’s center.
- 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 Manchester’s climate
What is the weather like in Manchester?
A typical July afternoon reaches 65°, a January night drops to 43°. Milder January nights than 92% of U.S. towns; cooler July afternoons than all but 21 U.S. towns.
How cold does it get in Manchester in winter?
December nights average 42°. In the coldest December of the last 30 years the month averaged 47°.
How hot does it get in Manchester?
July, with a typical high of 65°. 90° days are rare.
What growing zone is Manchester in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 33°.
What is the best time of year to visit Manchester?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Manchester getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Manchester.
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.