Weather in Alhambra, CA | Month by Month Climate Guide

Alhambra Climate at a Glance

Season by Season

Summer, June through September

Summer is the hottest and driest stretch. August averages a high near 87 degrees and a low near 66. Rain is close to zero from June through August, and June often records less than a tenth of an inch.

June and July give the most sunshine, about 12 hours a day. UV index peaks between June and September, so sunscreen matters.

Heat waves push temperatures into the mid 90s and occasionally past 100. Air conditioning is not optional in an Alhambra summer. Electric bills rise sharply in July and August.

Air quality is the other summer issue. The San Gabriel Valley traps ozone against the mountains, so smog levels run higher here than along the coast.

Fall, October and November

Fall is the most comfortable time of year for many residents. Days stay warm, evenings cool down, and humidity drops. November is the least humid month at about 47 percent.

Fall also brings Santa Ana winds. These dry offshore winds sweep down from the high desert, spike temperatures, drop humidity, and raise fire risk across Southern California. Gusts can knock down branches and cause brief power outages.

Winter, December through February

Winter is mild. December averages a high near 63 degrees and a low near 48. Frost is rare and brief.

This is also the rainy season. February records the most rain, with about 1.8 inches falling across roughly six days. December can be wetter in a strong year. Total winter rain accounts for most of the annual 16 inches.

Winter is the cloudiest stretch, with January, February, and December averaging about 6.9 hours of sunshine a day. Heating bills stay low compared to most of the country.

Spring, March through May

Spring is mild and green. Rain tapers off through March and April. Temperatures climb steadily from the 60s into the upper 70s.

May often brings May Gray, when a marine layer pushes inland and produces overcast mornings that clear by afternoon. March records the highest relative humidity of the year at about 59 percent.

Monthly Temperature Snapshot

Values are approximate averages in degrees Fahrenheit and vary year to year.

How the Weather Affects Daily Life

Here is what the climate actually means once you live here.

• You will use air conditioning heavily from June through September and heating barely at all
• Outdoor plans are safe almost year-round, which is why parks like Almansor stay busy in January
• Landscaping needs irrigation, and water restrictions apply during drought years
• Fall wind events can down trees and interrupt power, so a backup phone charger helps
• Winter rain arrives in bursts, and Los Angeles County drivers slow the freeways significantly on wet days
• Summer smog days matter if anyone in the household has asthma

Best Time of Year to Move to Alhambra

Weather rarely blocks a move here, but some months are easier than others.

Summer is peak moving season across Southern California, so trucks and crews book out further. Winter offers more schedule flexibility.

Plan Your Move Around the Forecast

Southern California weather is predictable enough to plan around, and a good moving company will work with you on timing. Our local movers operate seven days a week across Los Angeles County and can shift start times to beat the afternoon heat in July or work around a rain window in February. Local moves are billed hourly with a three-hour minimum, furniture is wrapped and padded at no extra cost, and there is no cancellation fee if plans change.