The best times to visit Norristown for ideal weather are

April 30th to July 1st

or

August 6th to October 14th

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

 

 


Other Norristown Travel Info

Weather in Norristown

Temperature

Average temperatures in Norristown vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 53rd 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 Norristown, 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 87.6°F (30.9°C) with temperatures rarely dropping below 68°F (20°C) at night.

Norristown Temperatures (Fahrenheit)

Key
High
Average
Low

Norristown 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.

Norristown Perceived Temperature (F)

Key
High
Average
Low

Norristown Perceived Temperature (C)

Key
High
Average
Low

 

Average Norristown 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 40.2 32.3 25.5
Feb 41.1 32.7 25.5
Mar 53 42.4 34.1
Apr 65.2 53.4 43.2
May 75.7 63.9 53.6
Jun 82.2 71.6 61.9
Jul 86.5 76.1 66.4
Aug 83.5 72.8 63.2
Sep 77.8 66.5 56.5
Oct 66.2 55.3 45.9
Nov 54.7 44.9 36.6
Dec 46.3 38.6 32.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 4.6 0.2 -3.6
Feb 5.1 0.4 -3.6
Mar 11.7 5.8 1.2
Apr 18.4 11.9 6.2
May 24.3 17.7 12
Jun 27.9 22 16.6
Jul 30.3 24.5 19.1
Aug 28.6 22.7 17.3
Sep 25.4 19.2 13.6
Oct 19 12.9 7.7
Nov 12.6 7.2 2.6
Dec 7.9 3.7 0.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Norristown are November, January, and then February. 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 April with an average of 1 days of significant precipitation the week of April 9th.

When can you find snow in Norristown? 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 Norristown.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Norristown (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 3% 0 0.3
Feb 4% 0 0.3
Mar 5% 0 0.8
Apr 5% 0 0.5
May 5% 0 0.8
Jun 6% 0 1
Jul 5% 0 0.9
Aug 5% 0 1.3
Sep 4% 0 0.6
Oct 6% 0 1.3
Nov 2% 0 0.3
Dec 4% 0 0.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 3 0 0.8
Feb 4 0 0.8
Mar 5 0 2
Apr 5 0 1.3
May 5 0 2
Jun 6 0 2.5
Jul 5 0 2.3
Aug 5 0 3.3
Sep 4 0 1.5
Oct 6 0 3.3
Nov 2 0 0.8
Dec 4 0 1.8

 

Humidity and Wind

Norristown has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is April (47.9% relative humidity), and the most humid month is October (69.1%).

Wind in Norristown is usually extremely calm. The windiest month is April, followed by March and February. April’s average wind speed of around 5.1 knots (5.8 MPH or 9.4 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 early April where average top sustained speeds reach 13.2 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 4.3 Light breeze 10.8 Gentle breeze
Feb 4.8 Light breeze 11.7 Significant breeze
Mar 4.9 Light breeze 11.5 Gentle breeze
Apr 5.1 Light breeze 12.3 Significant breeze
May 3.9 Barely noticeable 10.3 Gentle breeze
Jun 3.2 Barely noticeable 9.5 Gentle breeze
Jul 2.7 Barely noticeable 9 Gentle breeze
Aug 2.4 Barely noticeable 8.1 Gentle breeze
Sep 2.7 Barely noticeable 8.5 Gentle breeze
Oct 3.1 Barely noticeable 9.2 Gentle breeze
Nov 3.6 Barely noticeable 9.5 Gentle breeze
Dec 4.2 Light breeze 10.6 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 55.7%
Feb 53.1%
Mar 48.8%
Apr 47.9%
May 56.6%
Jun 59.7%
Jul 59.5%
Aug 64.8%
Sep 68%
Oct 69.1%
Nov 62%
Dec 66%

 

Is it Safe to Travel to Norristown?

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 Norristown, PA, 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 Norristown 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 slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 31.4 in November means 31.4% of the tourists vs. July.

 

 

Overall Norristown Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 81.6°F (27.6°C) and 44.4°F (6.9°C) with far warmer temperatures in the later months. Rain is rare with 1 to 2 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 comfortable. These months see the most precipitation with 1 to 2 days of precipitation per month. June – August is the busiest season for tourism in Norristown, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 82.3°F (27.9°C) and 50.7°F (10.4°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 2 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 Norristown to be enjoyable for warm weather travelers. The average high during this season is between 47.2°F (8.4°C) and 36.8°F (2.7°C). On average, it rains or snows a smalll amount: consistently 1 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› the United States › Norristown, PA, US