Castro Valley, California, United States of America: What to pack, what to wear, and when to go [2022]

This article contains affiliate links to Amazon and other vendors. We may earn commission from purchases made through these links.

Traveling to Castro Valley, California, United States of America? If you're planning to go to Castro Valley, this article contains some important information about when to go, what to wear, and what to pack.

Contents

About your travel guide

Hi! I'm Dev. I've traveled all over the world and in my travels, I have made many packing lists. In this series, my team and I have compiled the most useful information, as well as things we couldn't live without, to help you plan your trip.


When to go to Castro Valley, California, United States of America

Based on the climate and weather in Castro Valley, the best time to go is August. See below for details.

Important essentials for Castro Valley, California, United States of America

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

IMPORTANT COVID-19 ESSENTIALS

Other health necessities


  • Travel first aid kit

    This one is a great value.


  • Emergency rapid COVID-19 test

    U.S. residents can get them free here. Otherwise, you can buy them here.


  • Emergency motion sickness relief

Don't forget these

Activities for Castro Valley, California, United States of America

Here are some activity recommendations and activity-specific packing tips for Castro Valley.

We also recommend these top tours in and around Castro Valley.

    What to wear/what to pack for Castro Valley, California, United States of America by month

    Already know when you're traveling?

    January

    January in Castro Valley is crisp. The rain can amount to several inches/centimeters. During this time, temperatures average in the low 40s F (single digits C) to high 50s F (mid 10s C), although night temperatures can dip into the low 30s F (single digits C).

    What to wear/what to pack:

    February

    February can be 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:

    March

    March in this region is cool. Temperatures average in the 60s F (high 10s C) during the day. It rains regularly.

    What to wear/what to pack:

    April

    April in Castro Valley is balmy. The average overnight temperatures in the area are in the high 40s F (single digits C).

    What to wear/what to pack:

    May

    May in this region is balmy and dry with little rain. Temperatures average in the high 60s F (low 20s C) during the day.

    What to wear/what to pack:

    June

    If you vacation in Castro Valley during June, you will probably notice that it is mild and very dry with almost no rain. Temperatures tend to hover around the low 70s F (low 20s C) during the day, while at night they can dip into the 50s F (low 10s C).

    What to wear/what to pack:

    July

    July in Castro Valley is warm 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:

    August

    August here is warm and very dry with almost no rain. Temperatures average in the 70s F (mid 20s C) during the day.

    What to wear/what to pack:

    September

    September in this region is warm and very dry with almost no rain. Temperatures average in the 70s F (mid 20s C) during the day.

    What to wear/what to pack:

    October

    October for Castro Valley is mild and dry with little rain. Temperatures average in the low 70s F (low 20s C) during the day. It rains occasionally.

    What to wear/what to pack:

    November

    November in Castro Valley is cool. The rain can amount to several inches/centimeters. During this time, temperatures average in the 60s F (high 10s C), although night temperatures can dip into the low 40s F (single digits C).

    What to wear/what to pack:

    December

    If you visit Castro Valley during December, you might see that it is relatively cool. Temperatures tend to hover around the high 50s F (mid 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 about half of the time.

    What to wear/what to pack:

    Check out our guides for these other locations: Lincoln, Rhode Island, United States of America, Llandudno, South Africa, Desert Hot Springs, California, United States of America, Gevgelija, Macedonia, Chengde, China, Knox County, Maine, United States of America, Pontefract, England, United Kingdom, Acadiana, Louisiana, United States of America, Bujumbura, Burundi, Llandovery, Wales, United Kingdom, and Niepołomice, Poland.