San Diego, California, United States of America: What to pack, what to wear, and when to go [2021]

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

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When to go to San Diego, California, United States of America

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

Important esssentials for San Diego, California, United States of America

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

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

January

If you visit San Diego during January, you may notice that it is mild. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the high 40s F (single digits C).

Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain 5-10 days this month.

What to wear/what to pack:

February

If you go to San Diego in February, you will notice that it is crisp. Expect it to rain once in a while. Daytime temperatures are in the 60s F (high 10s C).

What to wear/what to pack:

March

If you visit San Diego during March, you will probably notice that it is mild. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the low 50s F (low 10s C).

Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain 5-10 days this month.

What to wear/what to pack:

April

April in San Diego is mild and dry with little rain. Temperatures average in the high 60s F (low 10s C) during the day. It rains once in a while.

What to wear/what to pack:

May

If you vacation in San Diego during May, you will probably find that it is balmy and very dry with almost no rain. Temperatures tend to hover around the high 60s F (low 20s C) during the day, while at night they can dip into the high 50s F (mid 10s C).

Humidity is generally between 60 and 70% during the day.

What to wear/what to pack:

June

If you are traveling to San Diego in June, 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:

July

July here is a perfect temperature 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:

August

If you go to San Diego in August, you will notice that it is a perfect temperature and very dry with almost no rain. Daytime temperatures are in the 70s F (mid 20s C).

What to wear/what to pack:

September

If you are traveling to San Diego in September, you will notice that it is warm and very dry with almost no rain. Daytime temperatures are in the 70s F (mid 20s C).

What to wear/what to pack:

October

If you vacation in San Diego during October, you might notice that it is balmy and dry with little rain. Temperatures tend to hover around the low 70s F (low 20s C) during the day, while at night they can dip into the low 60s F (mid 10s C).

Humidity is generally between 60 and 70% during the day.

What to wear/what to pack:

November

If you are traveling to San Diego in November, you will notice that it is balmy and dry with little rain. Expect it to rain once in a while. Daytime temperatures are in the high 60s F (low 20s C).

What to wear/what to pack:

December

December is chilly. Temperatures average in the 60s F (high 10s C) during the day. It rains occasionally.

What to wear/what to pack:

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