The best times to visit Walnut for ideal weather are

April 30th to June 17th

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

 

 


Other Walnut Travel Info

Weather in Walnut

Temperature

Average temperatures in Walnut vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 29th 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 Walnut, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 91.3°F (32.9°C) with temperatures rarely dropping below 68°F (20°C) at night.

Walnut Temperatures (Fahrenheit)

Key
High
Average
Low

Walnut 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.

Walnut Perceived Temperature (F)

Key
High
Average
Low

Walnut Perceived Temperature (C)

Key
High
Average
Low

 

Average Walnut 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 35.9 22.6 11.8
Feb 37.7 24.9 14
Mar 56 41 28.7
Apr 66.6 51.9 39.3
May 77.5 63.7 50.8
Jun 85.6 73.3 61.6
Jul 90 77.8 66
Aug 88 75.6 64.3
Sep 81.3 66.8 54.6
Oct 68.8 54.2 42
Nov 54.4 40.4 28.9
Dec 38.1 26.4 16.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.2 -5.2 -11.2
Feb 3.2 -3.9 -10
Mar 13.3 5 -1.8
Apr 19.2 11.1 4.1
May 25.3 17.6 10.4
Jun 29.8 22.9 16.4
Jul 32.2 25.4 18.9
Aug 31.1 24.2 17.9
Sep 27.4 19.3 12.6
Oct 20.4 12.3 5.6
Nov 12.4 4.7 -1.7
Dec 3.4 -3.1 -8.4

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Walnut are January, February, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid February. For example, on the week of February 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid May with an average of 2 days of significant precipitation the week of May 7th.

When can you find snow in Walnut? Weather stations report large amounts of snow likely to be deepest around January, especially close to early to mid January. The best time to ski (if at all) in Walnut is often around around March 12th when fresh powder is deepest. 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 Walnut.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Walnut (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 4% 5 0.5
Feb 7% 3.4 0.9
Mar 10% 2.6 1.3
Apr 23% 1.2 3.9
May 27% 0 5.5
Jun 28% 0 5.9
Jul 16% 0 2.7
Aug 24% 0 5.7
Sep 19% 0 3.5
Oct 17% 2 3.2
Nov 7% 1.3 1.1
Dec 13% 4.3 1.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 4 12.7 1.3
Feb 7 8.6 2.3
Mar 10 6.6 3.3
Apr 23 3 9.9
May 27 0 14
Jun 28 0 15
Jul 16 0 6.9
Aug 24 0 14.5
Sep 19 0 8.9
Oct 17 5.1 8.1
Nov 7 3.3 2.8
Dec 13 10.9 4.3

 

Humidity and Wind

Walnut has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is April (49.1% relative humidity), and the most humid month is December (66%).

Wind in Walnut is usually moderate. The windiest month is April, followed by March and May. April’s average wind speed of around 10.2 knots (11.7 MPH or 18.8 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 19.1 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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 9.1 Gentle breeze 16.9 Significant breeze
Feb 9.1 Gentle breeze 16.9 Significant breeze
Mar 9.6 Gentle breeze 17.7 Significant breeze
Apr 10.2 Gentle breeze 18.9 Strong breeze
May 9.3 Gentle breeze 18 Significant breeze
Jun 8.2 Gentle breeze 17.7 Strong breeze
Jul 7.3 Gentle breeze 14.8 Significant breeze
Aug 7.2 Gentle breeze 14.7 Significant breeze
Sep 7.8 Gentle breeze 15.1 Significant breeze
Oct 8.4 Gentle breeze 16 Significant breeze
Nov 9.3 Gentle breeze 16.8 Significant breeze
Dec 8.7 Gentle breeze 15.8 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 59.7%
Feb 60.4%
Mar 54.1%
Apr 49.1%
May 52.2%
Jun 58.8%
Jul 58.5%
Aug 61.5%
Sep 59.2%
Oct 53.6%
Nov 54.6%
Dec 66%

 

Is it Safe to Travel to Walnut?

Our best data indicates this area is generally safe. As of Dec 04, 2023 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 Dec 04, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Walnut, IA, US is June, followed by May and February. 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 Walnut in November. 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 somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 48.4 in November means 48.4% of the tourists vs. June.

 

 

Overall Walnut Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 81.8°F (27.7°C) and 38.3°F (3.5°C) with far warmer temperatures in the later months. Rain is somewhat common with 3 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 5 to 8 days of precipitation per month. June – August is the busiest season for tourism in Walnut, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 83.8°F (28.8°C) and 47.1°F (8.4°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 2 to 6 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 far too cold this time of year in Walnut to be enjoyable for warm weather travelers. The average high during this season is between 40.9°F (4.9°C) and 33.6°F (0.9°C). On average, it rains or snows a smalll amount: 1 to 4 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› the United States › Walnut, IA, US