West Sussex Weather by Month — Temperature & Rainfall Guide

West Sussex is a region in the United Kingdom. Many people wonder what the weather conditions are in West Sussex over the year. What is the best time to visit West Sussex?

This page shows the average weather conditions by month in West Sussex over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in West Sussex is generally less favorable. January is a winter month. In Chichester you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 5°C (41°F).

Find more detailed climate information for West Sussex in January here.

In February the weather in West Sussex is generally less favorable. February is a winter month. In Chichester you can expect cold maximum average daytime temperatures around 9°C (48°F) and nighttime temperatures around 4°C (39°F). On average, this month is the coldest month of the year in West Sussex.

Find more detailed climate information for West Sussex in February here.

In March the weather in West Sussex ranges from less favorable in Pagham to mixed in Chichester. In Chichester you can expect cold maximum average daytime temperatures around 11°C (52°F) and nighttime temperatures around 5°C (41°F).

Find more detailed climate information for West Sussex in March here.

In April the weather in West Sussex ranges from mixed in Chichester to good in Crawley. The average maximum daytime temperatures are moderate and range from 12°C (54°F) in Selsey to 14°C (57°F) in East Grinstead.

Find more detailed climate information for West Sussex in April here.

In May the weather in West Sussex ranges from good in Chichester to very good in East Grinstead. The average maximum daytime temperatures are moderate and range from 15°C (59°F) in Selsey to 18°C (64°F) in Alfold.

Find more detailed climate information for West Sussex in May here.

In June the weather in West Sussex ranges from very good in Chichester to excellent in Crawley. The temperatures range from moderate in Selsey with 18°C (64°F) to pleasant in East Grinstead with 20°C (68°F).

Find more detailed climate information for West Sussex in June here.

In July the weather in West Sussex is generally excellent. July is a summer month. The temperatures range from pleasant in Selsey with 20°C (68°F) to high in Horley with 23°C (73°F).

Find more detailed climate information for West Sussex in July here.

In August the weather in West Sussex is generally excellent. August is a summer month. The temperatures range from pleasant in Selsey with 20°C (68°F) to high in Crawley with 22°C (72°F). On average, this month is the warmest month of the year in West Sussex.

Find more detailed climate information for West Sussex in August here.

In September the weather in West Sussex ranges from very good in Chichester to excellent in Crawley. September is a summer month. In Chichester you can expect pleasant maximum average daytime temperatures around 19°C (66°F) and nighttime temperatures around 13°C (55°F).

Find more detailed climate information for West Sussex in September here.

In October the weather in West Sussex ranges from mixed in Chichester to good in Crawley. In Chichester you can expect mild maximum average daytime temperatures around 16°C (61°F) and nighttime temperatures around 11°C (52°F).

Find more detailed climate information for West Sussex in October here.

In November the weather in West Sussex ranges from less favorable in Chichester to mixed in Crawley. In Chichester you can expect mild maximum average daytime temperatures around 13°C (55°F) and nighttime temperatures around 8°C (46°F).

Find more detailed climate information for West Sussex in November here.

In December the weather in West Sussex ranges from less favorable in Chichester to mixed in East Preston. December is a winter month. In Chichester you can expect cold maximum average daytime temperatures around 10°C (50°F) and nighttime temperatures around 5°C (41°F).

Find more detailed climate information for West Sussex in December here.