Johnstown (PA)
May
Weather in Johnstown, Pennsylvania for May 2027
Your guide to Johnstown weather in May - trends and predictions
In general, the average temperature in Johnstown at the beginning of May is 16.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 18.7 °C by the end of May.
Johnstown experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 200.3 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
7
Dry days
24
Rainy days
0
Snow days
16°/8°
Temperatures
18 km/h
Avg max wind
81 %
Avg humidity
Johnstown Weather May
Move between months or click on a day
Temperatures trend during May in Johnstown
See the weather trend as well as the moving average line
May weather in Johnstown day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Moderate rain at times | 17° /4° | 4.6 mm | 4 | |
| May 2 | Moderate rain at times | 15° /7° | 4.9 mm | 4 | |
| May 3 | Moderate rain at times | 16° /6° | 2.7 mm | 6 | |
| May 4 |  Heavy rain at times | 18° /7° | 4.4 mm | 3 | |
| May 5 | Moderate or heavy rain shower | 20° /11° | 3.5 mm | 4 | |
| May 6 | Moderate rain at times | 15° /7° | 5.6 mm | 2 | |
| May 7 |  Patchy rain possible | 15° /6° | 1.9 mm | 6 | |
| May 8 | Moderate rain at times | 16° /5° | 1.9 mm | 4 | |
| May 9 | Patchy rain possible | 13° /6° | 7.2 mm | 3 | |
| May 10 |  Partly cloudy | 16° /4° | 1.6 mm | 6 | |
| May 11 |  Sunny | 17° /6° | 0 mm | 8 | |
| May 12 |  Overcast | 20° /5° | 0.4 mm | 8 | |
| May 13 | Moderate or heavy rain shower | 17° /10° | 19.9 mm | 3 | |
| May 14 | Patchy rain possible | 13° /9° | 2.9 mm | 2 | |
| May 15 | Patchy rain possible | 20° /9° | 0.1 mm | 7 | |
| May 16 | Moderate or heavy rain shower | 23° /10° | 5.1 mm | 8 | |
| May 17 | Patchy rain possible | 24° /13° | 4 mm | 3 | |
| May 18 | Patchy rain possible | 24° /12° | 0.9 mm | 7 | |
| May 19 | Patchy rain possible | 20° /12° | 1.3 mm | 7 | |
| May 20 | Overcast | 20° /8° | 9.3 mm | 4 | |
| May 21 | Moderate or heavy rain shower | 14° /9° | 23.1 mm | 2 | |
| May 22 | Moderate or heavy rain shower | 13° /8° | 19.4 mm | 6 | |
| May 23 | Heavy rain at times | 10° /6° | 12.5 mm | 2 | |
| May 24 | Patchy rain possible | 16° /6° | 5.7 mm | 2 | |
| May 25 | Overcast | 18° /9° | 7.1 mm | 4 | |
| May 26 |  Cloudy | 21° /9° | 3.5 mm | 9 | |
| May 27 | Heavy rain at times | 20° /11° | 8 mm | 4 | |
| May 28 |  Light rain | 15° /8° | 10.1 mm | 6 | |
| May 29 |  Fog | 19° /7° | 0 mm | 7 | |
| May 30 |  Moderate rain | 19° /11° | 16.4 mm | 7 | |
| May 31 |  Thundery outbreaks possible | 19° /7° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Johnstown in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Johnstown forecast closer to your planned date for the most up-to-date weather information.
Change Month
Johnstown in May - FAQ
What are the expected maximum and minimum temperatures in Johnstown during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Johnstown during May?
Significant rainfall exceeding 200.3 mm is expected in Johnstown during May, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Johnstown during May?
The average wind speed in Johnstown during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Johnstown
Explore the daily rainfall trends and prepare for Johnstowns May weather 💧
Typically, Johnstown has 24 rainy days in May with a total of 200.3 mm of rainfall.
UV exposure in Johnstown during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Quick links
More Johnstown weather pages
You are here
Where is Johnstown?Get accurate weather forecasts for Johnstown, located at latitude 40.327 and longitude -78.922. Stay updated with localized weather information tailored for Johnstown.
Found a mistake?
We appreciate your attention to details. Tell us here.