The temperatures in Hillsboro in May are quite cold with temperatures between 7°C and 20°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Hillsboro during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hillsboro in May 2025.
If you’re planning to visit Hillsboro in the near future, we highly recommend that you review the 14 day weather forecast for Hillsboro before you arrive.
Temperatures
20° / 7°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
93
mm
Sun Hours
9.1
Hrs
