Contra Costa County, California, United States of America: What to pack, what to wear, and when to go [2018]

Traveling to Contra Costa County, California, United States of America? If you're planning to go to Contra Costa County, here is some important information about when to go, what to wear, and what to pack:

When to go to Contra Costa County, California, United States of America

Based on the climate and weather in Contra Costa County, the best time to go is August. See below for details.

What to wear/what to pack for Contra Costa County, California, United States of America by month

January

If you visit Contra Costa County during January, you are likely to find that it is crisp. Temperatures tend to hover around the 50s F (low 10s C) during the day, while at night they can dip into the low 40s F (single digits C).

In terms of precipitation, you can expect it to rain a bit less than half of the time.

What to wear/what to pack:

  • Umbrella
  • Long sleeve shirts or blouses
  • Rain coat
  • Socks
  • Long skirts
  • Standard footwear
  • Pants or jeans
  • Waterproof luggage
  • Waterproof footwear
  • Light jacket or fleece
  • Dresses

February

If you are traveling to Contra Costa County in February, you will notice that it is relatively cool. Expect it to rain about a third of the time. Daytime temperatures are in the high 50s F (mid 10s C).

What to wear/what to pack:

  • Long skirts
  • Waterproof footwear
  • Light jacket or fleece
  • Standard footwear
  • Pants or jeans
  • Long sleeve shirts or blouses
  • Socks
  • Rain coat
  • Umbrella
  • Waterproof luggage
  • Dresses

March

March for Contra Costa County is chilly. Temperatures average in the low 60s F (mid 10s C) during the day. It rains a bit less than half of the time.

What to wear/what to pack:

  • Pants or jeans
  • Socks
  • Long skirts
  • Waterproof footwear
  • Waterproof luggage
  • Dresses
  • Long sleeve shirts or blouses
  • Standard footwear
  • Umbrella
  • Light jacket or fleece
  • Rain coat

April

April for Contra Costa County is relatively cool. Temperatures average in the low 60s F (high 10s C) during the day. It rains sometimes.

What to wear/what to pack:

  • Socks
  • Umbrella
  • Waterproof footwear
  • Rain coat
  • Waterproof luggage
  • Long skirts
  • Long sleeve shirts or blouses
  • Light jacket or fleece
  • Dresses
  • Pants or jeans
  • Standard footwear

May

If you are traveling to Contra Costa County in May, you will notice that it is balmy and dry with little rain. Daytime temperatures are in the 60s F (high 10s C).

What to wear/what to pack:

  • Pants or jeans
  • Long sleeve shirts or blouses
  • Long skirts
  • Dresses
  • Standard footwear
  • Socks
  • Light jacket or fleece

June

If you go to Contra Costa County in June, you will notice that it is mild and very dry with almost no rain. Daytime temperatures are in the low 60s F (low 20s C).

What to wear/what to pack:

  • Socks
  • Long skirts
  • Dresses
  • Standard footwear
  • Light jacket or fleece
  • Pants or jeans
  • Long sleeve shirts or blouses

July

July in Contra Costa County is balmy and very dry with almost no rain. Temperatures average in the low 60s F (low 20s C) during the day.

What to wear/what to pack:

  • Long skirts
  • Long sleeve shirts or blouses
  • Socks
  • Pants or jeans
  • Dresses
  • Standard footwear
  • Light jacket or fleece

August

If you go to Contra Costa County in August, you will notice that it is mild and very dry with almost no rain. Daytime temperatures are in the low 70s F (low 20s C).

What to wear/what to pack:

  • Shorts or short pants
  • Dresses
  • Sunscreen lotion
  • Skirts
  • Sandals
  • Long and short sleeve shirts
  • Light footwear
  • If you're going to the beach, bathing suits, swimwear

September

September for Contra Costa County is balmy and very dry with almost no rain. Temperatures average in the low 70s F (low 20s C) during the day.

What to wear/what to pack:

  • Long and short sleeve shirts
  • Shorts or short pants
  • Skirts
  • Dresses
  • Sandals
  • Sunscreen lotion
  • If you're going to the beach, bathing suits, swimwear
  • Light footwear

October

October in Contra Costa County is balmy and dry with little rain. The average overnight temperatures in the area are in the low 50s F (single digits C).

What to wear/what to pack:

  • Socks
  • Standard footwear
  • Long sleeve shirts or blouses
  • Pants or jeans
  • Dresses
  • Long skirts
  • Light jacket or fleece

November

If you visit Contra Costa County during November, you are likely to find that it is cool. Temperatures tend to hover around the low 60s F (high 10s C) during the day, while at night they can dip into the 40s F (single digits C).

In terms of precipitation, you can expect it to rain regularly.

What to wear/what to pack:

  • Standard footwear
  • Umbrella
  • Rain coat
  • Pants or jeans
  • Dresses
  • Waterproof footwear
  • Waterproof luggage
  • Long sleeve shirts or blouses
  • Socks
  • Light jacket or fleece
  • Long skirts

December

If you vacation in Contra Costa County during December, you are likely to find that it is crisp. Temperatures tend to hover around the 50s F (low 10s C) during the day, while at night they can dip into the low 40s F (single digits C).

In terms of precipitation, you can expect it to rain regularly.

What to wear/what to pack:

  • Dresses
  • Standard footwear
  • Umbrella
  • Rain coat
  • Waterproof footwear
  • Light jacket or fleece
  • Socks
  • Long sleeve shirts or blouses
  • Waterproof luggage
  • Pants or jeans
  • Long skirts

Year-round what to wear/what to pack for Contra Costa County, California, United States of America

Here are some general tips on what to wear in Contra Costa County, as well as several items to remember to pack when traveling there.

  • A plug adadpter that supports outlet types A and B
  • A SIM card that works in Contra Costa County
  • Appropriate museum wear

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