Climate averages 1991–2020

Siwān weather
in July.

A hot, very wet month: the 5th warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 31.9°C Daytime mean, July

Average low 26.3°C Night-time mean, July

Rainfall 329 mm 26 days with ≥1 mm

Daylight 14 h Sunrise to sunset, per day

July is a hot month in Siwān: daytime highs average 31.9°C and nights cool to about 26.3°C. By daytime temperature it is the 5th warmest of the 12 months.

Expect about 329 mm of rain on roughly 26 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 37 min on an average July day.

The nearest other city in this atlas is Chāpra (63 km away). In July its highs average 32.0°C, about as warm as Siwān, with 318 mm of rain.

Among the 692 cities listed in India, Siwān ranks joint 274th of 692 for the warmest July highs and 507th of 692 for the driest July (rainfall, lowest first). The mean July high of those 692 cities is 31.0°C; Siwān is 0.8°C warmer than that mean.

From July to August, average highs fall by 0.3°C to 31.5°C, and monthly rainfall falls from 329 mm to 294 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Siwān climate table

1991–2020

Monthly climate averages for Siwān, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	21.8°C10.3°C	10.3°C	16	2.2	10.711 h
February	25.7°C13.2°C	13.2°C	17	2.4	11.311 h
March	32.0°C18.2°C	18.2°C	12	2.1	12.012 h
April	37.1°C23.3°C	23.3°C	10	2.5	12.813 h
May	37.6°C26.1°C	26.1°C	29	5.2	13.413 h
June	35.6°C27.0°C	27.0°C	180	15.5	13.814 h
July, selected	31.9°C26.3°C	26.3°C	329	26.0	13.614 h
August	31.5°C26.0°C	26.0°C	294	26.6	13.113 h
September	30.9°C25.0°C	25.0°C	205	20.5	12.312 h
October	30.2°C21.3°C	21.3°C	37	4.3	11.612 h
November	27.8°C16.0°C	16.0°C	4.5	0.4	10.911 h
December	23.7°C11.8°C	11.8°C	7.6	0.7	10.511 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Siwān

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Siwān) is explained once on the Siwān year overview and on the Sources, method and limits page.