San Diego County, California, United States of America: What to pack, what to wear, and when to go [2022]

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

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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 San Diego County, California, United States of America

Based on the climate and weather in San Diego County, the best time to go is September. See below for details.

Important essentials for San Diego County, California, United States of America

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

COVID-19 ESSENTIALS FOR 2022


  • Kids' KN95 masks

    N95 masks don't exist for kids. These are a good alternative (and can also be used by adults if N95 masks are not available).


  • Travel insurance

    If you or a companion get COVID-19, your amazing trip can be ruined. Good travel insurance can help. See plans


  • A vaccine card protector

    Vaccine cards often wear away. An unreadable card can cause severe consequences. This vaccine card protector helps stop that.


  • Hand sanitizer

    This hand sanitizer is an excellent TSA-friendly choice.


  • Travel disinfecting wipes

    Use these to sanitize plane and hotel surfaces.


  • N95 masks to use in crowded airports

    These N95 masks provide the best level of COVID protection you can have.

General health necessities

Don't forget these

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

Already know when you're traveling?

January

January in San Diego County is pretty cool. The average overnight temperatures in the area are in the 30s F (single digits C).

What to wear/what to pack:

February

If you vacation in San Diego County during February, you may see that it is chilly. Temperatures tend to hover around the high 50s F (mid 10s C) during the day, while at night they can dip into the high 30s F (single digits C). In terms of precipitation, you can expect it to rain regularly.

What to wear/what to pack:

March

March in San Diego County is relatively cool. The average overnight temperatures in the area are in the high 30s F (single digits C).

What to wear/what to pack:

April

April in this region is balmy. Temperatures average in the low 70s F (low 20s C) during the day. It rains occasionally.

What to wear/what to pack:

May

If you go to San Diego County in May, you will notice that it is extremely warm and dry with little rain. Expect it to rain occasionally. Daytime temperatures are in the low 80s F (high 20s C).

What to wear/what to pack:

June

If you visit San Diego County during June, you might notice that it is really hot and dry with little rain. Temperatures tend to hover around the low 90s F (low 30s C) during the day, while at night they can dip into the low 60s F (mid 10s C).

What to wear/what to pack:

July

Traveling to San Diego County in July, you will notice that it is unbearably hot and very dry with almost no rain. Daytime temperatures are in the high 90s F (high 30s C).

What to wear/what to pack:

August

August in this region is sizzling and very dry with almost no rain. Temperatures average in the 90s F (mid 30s C) during the day.

What to wear/what to pack:

September

If you visit San Diego County during September, you will probably notice that it is constantly hot and dry with little rain. Temperatures tend to hover around the high 80s F (low 30s C) during the day, while at night they can dip into the low 50s F (mid 10s C).

What to wear/what to pack:

October

If you vacation in San Diego County during October, you are likely to find that it is warm and dry with little rain. Temperatures tend to hover around the 70s F (mid 20s C) during the day, while at night they can dip into the low 50s F (low 10s C).

What to wear/what to pack:

November

Traveling to San Diego County in November, you will notice that it is crisp. Expect it to rain sometimes. Daytime temperatures are in the low 60s F (high 10s C).

What to wear/what to pack:

December

December in San Diego County is pretty cool. The average overnight temperatures in the area are in the 30s F (single digits C).

What to wear/what to pack:

Activities for San Diego County, California, United States of America

Here are some activity recommendations and activity-specific packing tips for San Diego County.

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