Mercer County (Princeton)
June
Weather in Mercer County, New Jersey for June 2026
Your guide to Mercer County weather in June - trends and predictions
So far, June 2026 in Mercer County shows a warmer trend than usual by 3.2 °F.
The forecast for the upcoming days in Mercer County predicts a temperature of 29.8 °F, which is slightly above the historical average.
In general, the average temperature in Mercer County at the beginning of June is 27.1 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 30.1 °F by the end of June.
Mercer County in June brings notable rainfall, with an average of 16 rainy days and a total precipitation of 234.2 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
14
Dry days
16
Rainy days
0
Snow days
27°/17°
Temperatures
17 km/h
Avg max wind
71 %
Avg humidity
Mercer County Weather June
Move between months or click on a day
Temperatures trend during June in Mercer County
See the weather trend as well as the moving average line
June weather in Mercer County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jun. 1 |  Sunny | 22° /10° | 0 mm | 8 | |
| Jun. 2 |  Overcast | 25° /10° | 0 mm | 8 | |
| Jun. 3 |  Patchy rain possible | 27° /14° | 0.5 mm | 7 | |
| Jun. 4 | Sunny | 30° /15° | 0 mm | 9 | |
| Jun. 5 |  Fog | 30° /16° | 1.7 mm | 8 | |
| Jun. 6 | Light rain shower | 30° /18° | 9 mm | 8 | |
| Jun. 7 |  Partly cloudy | 26° /16° | 59 mm | 7 | |
| Jun. 8 |  Cloudy | 22° /14° | 1.3 mm | 7 | |
| Jun. 9 |  Light drizzle | 24° /13° | 6.7 mm | 7 | |
| Jun. 10 |  Moderate or heavy rain shower | 25° /16° | 8.9 mm | 7 | |
| Jun. 11 | Cloudy | 29° /16° | 0.6 mm | 8 | |
| Jun. 12 | Partly cloudy | 30° /18° | 2.2 mm | 9 | |
| Jun. 13 | Patchy rain possible | 28° /18° | 0 mm | 7 | |
| Jun. 14 | Cloudy | 30° /17° | 31.2 mm | 8 | |
| Jun. 15 | Mist | 22° /15° | 16.3 mm | 7 | |
| Jun. 16 | Overcast | 22° /13° | 2.5 mm | 7 | |
| Jun. 17 | Cloudy | 26° /15° | 0.7 mm | 8 | |
| Jun. 18 | Partly cloudy | 31° /18° | 21 mm | 9 | |
| Jun. 19 | Sunny | 32° /20° | 0 mm | 9 | |
| Jun. 20 | Sunny | 31° /17° | 0 mm | 9.2 | |
| Jun. 21 | Sunny | 28° /16° | 0 mm | 8.9 | |
| Jun. 22 | Patchy rain possible | 25° /18° | 2 mm | 1.9 | |
| Jun. 23 |  Moderate rain | 22° /16° | 13.1 mm | 2.9 | |
| Jun. 24 | Sunny | 29° /15° | 0 mm | 9 | |
| Jun. 25 | Sunny | 30° /17° | 0 mm | 1.3 | |
| Jun. 26 | Patchy rain possible | 22° /18° | 1.1 mm | 5 | |
| Jun. 27 | Moderate rain | 32° /19° | 7.3 mm | 5 | |
| Jun. 28 | Patchy rain possible | 29° /21° | 1 mm | 5 | |
| Jun. 29 | Patchy rain possible | 35° /22° | 0.6 mm | 6 | |
| Jun. 30 | Patchy rain possible | 34° /23° | 2.2 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Mercer County in June 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 Mercer County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Mercer County in June - FAQ
What are the expected maximum and minimum temperatures in Mercer County during June?
During June, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Mercer County during June?
Significant rainfall exceeding 234.2 mm is expected in Mercer County during June, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Mercer County during June?
The average wind speed in Mercer County during June is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
June rainfall patterns in Mercer County
Explore the daily rainfall trends and prepare for Mercer Countys June weather 💧
Typically, Mercer County has 16 rainy days in June with a total of 234.2 mm of rainfall.
UV exposure in Mercer County during June
Stay informed about UV levels for safe outdoor activities throughout the month of June ☀️
Top locations in Mercer County
Select a location for an accurate weather forecast
More Locations Quick links
More Mercer County weather pages
You are here
Where is Mercer County?Get accurate weather forecasts for Mercer County, located at latitude 40.349 and longitude -74.659. Stay updated with localized weather information tailored for Mercer County.
Found a mistake?
We appreciate your attention to details. Tell us here.