The temperatures in Bihar during September are extremely high, between 27°C and hot as 34°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Bihar. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Bihar in September 2025.
If you’re planning to visit Bihar in the near future, we highly recommend that you review the 14 day weather forecast for Bihar before you arrive.
Temperatures
34° / 27°
Rainy Days
11
Snowy Days
0
Dry Days
19
Rainfall
273
mm
Sun Hours
10.5
Hrs
