The best times to visit Downey for ideal weather are

March 5th to July 15th

or

October 1st to December 9th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Downey Travel Info

Weather in Downey

Temperature

Average temperatures in Downey vary somewhat. Considering humidity, temperatures feel very enjoyable all year with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 77th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Downey, the hottest months are September, August, and then July. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 88.5°F (31.4°C) with temperatures rarely dropping below 66.3°F (19.1°C) at night.

Downey Temperatures (Fahrenheit)

Key
High
Average
Low

Downey Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Downey Perceived Temperature (F)

Key
High
Average
Low

Downey Perceived Temperature (C)

Key
High
Average
Low

 

Average Downey Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 71.3 56.8 45.3
Feb 69 57 47.1
Mar 73.1 60.2 50.8
Apr 74.8 62.2 53.2
May 75.9 64.7 57.3
Jun 77.8 67 60.9
Jul 82.3 70.7 64.2
Aug 85.1 72.2 64.9
Sep 86.1 72.2 64.3
Oct 81.7 68.2 59
Nov 75.9 61.8 51.5
Dec 68.2 55.7 45.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 21.8 13.8 7.4
Feb 20.6 13.9 8.4
Mar 22.8 15.7 10.4
Apr 23.8 16.8 11.8
May 24.4 18.2 14.1
Jun 25.4 19.4 16.1
Jul 27.9 21.5 17.9
Aug 29.5 22.3 18.3
Sep 30.1 22.3 17.9
Oct 27.6 20.1 15
Nov 24.4 16.6 10.8
Dec 20.1 13.2 7.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Downey are June, August, and then July. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May to early June. For example, on the week of May 28th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 2 days of significant precipitation the week of December 17th.

When can you find snow in Downey? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Downey.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Downey (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.9
Feb 13% 0 1.7
Mar 5% 0 0.8
Apr 4% 0 0.5
May 3% 0 0.3
Jun 0% 0 0
Jul 1% 0 0.3
Aug 0% 0 0
Sep 2% 0 0.3
Oct 5% 0 0.5
Nov 6% 0 0.8
Dec 16% 0 3.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 4.8
Feb 13 0 4.3
Mar 5 0 2
Apr 4 0 1.3
May 3 0 0.8
Jun 0 0 0
Jul 1 0 0.8
Aug 0 0 0
Sep 2 0 0.8
Oct 5 0 1.3
Nov 6 0 2
Dec 16 0 7.9

 

Humidity and Wind

Downey has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is January (47.2% relative humidity), and the most humid month is July (60.4%).

Wind in Downey is usually calm. The windiest month is April, followed by May and June. April’s average wind speed of around 4.9 knots (5.7 MPH or 9.1 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid April where average top sustained speeds reach 12.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Downey.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 2.9 Barely noticeable 8.9 Gentle breeze
Feb 3.6 Barely noticeable 10.3 Gentle breeze
Mar 4.2 Light breeze 11.9 Gentle breeze
Apr 4.9 Light breeze 12.4 Significant breeze
May 4.9 Light breeze 11.4 Gentle breeze
Jun 4.7 Light breeze 10 Gentle breeze
Jul 4.6 Light breeze 10.1 Gentle breeze
Aug 4.4 Light breeze 10.2 Gentle breeze
Sep 4.1 Light breeze 10.8 Gentle breeze
Oct 3.6 Barely noticeable 10.6 Gentle breeze
Nov 3.2 Barely noticeable 9.8 Gentle breeze
Dec 3.2 Barely noticeable 9.7 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 47.2%
Feb 54.7%
Mar 52.2%
Apr 49.6%
May 54.4%
Jun 60%
Jul 60.4%
Aug 57.8%
Sep 56.6%
Oct 53.5%
Nov 49.4%
Dec 53.5%

 

Is it Safe to Travel to Downey?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Downey, CA, US is July, followed by August and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Downey in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 47.6 in December means 47.6% of the tourists vs. July.

 

 

Overall Downey Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 78.1°F (25.6°C) and 69.9°F (21.1°C) with warmer temperatures in the later months. Rain is rare with 1 to 2 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with about 0 days of precipitation per month. June – August is the busiest season for tourism in Downey, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 88.1°F (31.2°C) and 72.9°F (22.7°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: 1 to 2 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Winter (December through February)

Weather is somewhat cool this time of year in Downey to be enjoyable for warm weather travelers. The average high during this season is between 73.6°F (23.1°C) and 66.5°F (19.2°C). On average, it rains or snows a fair amount: 3 to 5 times per month. These times of year are fairly slow with tourists.

 

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