The best times to visit Dededo for ideal weather are

mid January

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



Other Dededo Travel Info

Weather in Dededo


Average temperatures in Dededo vary barely at all. Considering humidity, temperatures feel hot all year with a chance of rain throughout most of the year. The area is far less temperate than some — in the bottom 1 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 Dededo, the hottest months are June, May, and then July. See average monthly temperatures below. The warmest time of year is generally early to mid June where highs are regularly around 86.6°F (30.3°C) with temperatures rarely dropping below 77.8°F (25.4°C) at night.

Dededo Temperatures (Fahrenheit)


Dededo Temperatures (Celsius)


“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.

Dededo Perceived Temperature (F)


Dededo Perceived Temperature (C)



Average Dededo 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 82.9 78.4 74.3
Feb 83.1 78.4 74.5
Mar 83.3 78.7 74.9
Apr 84.7 80 76.2
May 85.7 81 76.8
Jun 86.3 81.5 77.3
Jul 85.4 80.6 76.1
Aug 85.1 79.9 75.3
Sep 85.1 79.8 75.1
Oct 84.6 79.6 75
Nov 84.9 80.5 76.7
Dec 84.1 79.7 75.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 28.3 25.8 23.5
Feb 28.4 25.8 23.6
Mar 28.5 25.9 23.8
Apr 29.3 26.7 24.6
May 29.8 27.2 24.9
Jun 30.2 27.5 25.2
Jul 29.7 27 24.5
Aug 29.5 26.6 24.1
Sep 29.5 26.6 23.9
Oct 29.2 26.4 23.9
Nov 29.4 26.9 24.8
Dec 28.9 26.5 24.4



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Dededo are February, March, and then April. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid February. For example, on the week of February 19th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid August with an average of 5 days of significant precipitation the week of August 13th.

When can you find snow in Dededo? 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 Dededo.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 34% 0 8.3
Feb 21% 0 2.7
Mar 24% 0 3.8
Apr 26% 0 3.1
May 28% 0 10.4
Jun 33% 0 5.9
Jul 49% 0 12.3
Aug 53% 0 13.1
Sep 56% 0 13.3
Oct 52% 0 11
Nov 38% 0 5.5
Dec 35% 0 4.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 34 0 21.1
Feb 21 0 6.9
Mar 24 0 9.7
Apr 26 0 7.9
May 28 0 26.4
Jun 33 0 15
Jul 49 0 31.2
Aug 53 0 33.3
Sep 56 0 33.8
Oct 52 0 27.9
Nov 38 0 14
Dec 35 0 12.2


Humidity and Wind

Dededo has some extremely humid months, and high humidity throughout the year. The least humid month is March (73.2% relative humidity), and the most humid month is September (84.1%).

Wind in Dededo is usually moderate. The windiest month is January, followed by March and February. January’s average wind speed of around 13 knots (15 MPH or 24.1 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid January where average top sustained speeds reach 20.4 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 13 Significant breeze 19 Strong breeze
Feb 12.6 Significant breeze 17.9 Strong breeze
Mar 12.9 Significant breeze 18.1 Strong breeze
Apr 11.5 Significant breeze 16.6 Significant breeze
May 10.1 Gentle breeze 15.6 Strong breeze
Jun 9.6 Gentle breeze 15.3 Significant breeze
Jul 8.2 Gentle breeze 15.4 Strong breeze
Aug 7.1 Gentle breeze 14.8 Significant breeze
Sep 7.8 Gentle breeze 15.5 Strong breeze
Oct 8.9 Gentle breeze 16.4 Significant breeze
Nov 11.9 Significant breeze 18.1 Strong breeze
Dec 12.4 Significant breeze 18.3 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 77.8%
Feb 73.9%
Mar 73.2%
Apr 76.8%
May 77.2%
Jun 77%
Jul 80.1%
Aug 80.8%
Sep 84.1%
Oct 83.4%
Nov 79.5%
Dec 78.1%


Is it Safe to Travel to Dededo?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for Guam; 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 Oct 26, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Dededo, Guam is July, followed by December and March. 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 Dededo in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 21.5 in October means 21.5% of the tourists vs. July.



Overall Dededo Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 86.1°F (30.1°C) and 82.8°F (28.2°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 9 days of significant precipitation per month. Spring is fairly slow 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 quite warm. These months see moderate precipitation with 10 to 16 days of precipitation per month. June – August is the busiest season for tourism in Dededo, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 85.7°F (29.8°C) and 84.5°F (29.2°C), which will feel very nice given the humidity and wind. It rains or snows a great amount: 11 to 17 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is perfect this time of year in Dededo to be enjoyable for warm weather travelers. The average high during this season is between 84.5°F (29.2°C) and 82.6°F (28.1°C). On average, it rains or snows a fair amount: 6 to 11 times per month. These times of year are the second busiest with tourists.


Best Times to TravelGuam › Dededo, Guam