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

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:

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.

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

January

January is brisk. Temperatures average in the 50s F (low 10s C) during the day. It rains or snows a bit less than half of the time.

What to wear/what to pack:

  • Warm pants or jeans
  • Socks
  • Fleeces
  • Jacket or coat
  • Waterproof coat
  • Standard footwear
  • Umbrella
  • Light gloves or mittens
  • Waterproof boots

February

February in San Diego County is cool. The rain can amount to several inches/centimeters.

During this time, temperatures average in the high 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:

  • Fleeces
  • Waterproof luggage
  • Jacket or coat
  • Umbrella
  • Socks
  • Light gloves or mittens
  • Waterproof footwear
  • Standard footwear
  • Rain coat
  • Warm pants or jeans

March

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

What to wear/what to pack:

  • Jacket or coat
  • Fleeces
  • Light gloves or mittens
  • Umbrella
  • Socks
  • Warm pants or jeans
  • Waterproof footwear
  • Waterproof luggage
  • Rain coat
  • Standard footwear

April

If you vacation in San Diego County during April, you are likely to find that it is mild. Temperatures tend to hover around the low 70s F (low 20s 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 occasionally.

What to wear/what to pack:

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

May

If you visit San Diego County during May, you are likely to find that it is hot and dry with little rain. Temperatures tend to hover around the low 80s F (high 20s C) during the day, while at night they can dip into the low 50s F (low 10s C).

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

What to wear/what to pack:

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

June

If you visit San Diego County during June, you are likely to find that it is extremely 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:

  • If you're going to the beach, bathing suits, swimwear
  • Dresses
  • Skirts
  • Short sleeve shirts
  • Shorts
  • Sunglasses
  • Sandals
  • Sunscreen lotion

July

Traveling to San Diego County in July, you will notice that it is blindingly 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:

  • Skirts
  • High-SPF sunscreen lotion
  • Sandals
  • If you're going to the beach, bathing suits, swimwear
  • Thin short sleeve shirts
  • Thin pants, such as light khakis
  • Tank tops
  • Sunglasses
  • Light dresses
  • Light shorts

August

If you go to San Diego County in August, you will notice that it can be sizzling and very dry with almost no rain. Daytime temperatures are in the 90s F (mid 30s C).

What to wear/what to pack:

  • Light dresses
  • Thin short sleeve shirts
  • Tank tops
  • If you're going to the beach, bathing suits, swimwear
  • Sandals
  • Thin pants, such as light khakis
  • Light shorts
  • High-SPF sunscreen lotion
  • Skirts
  • Sunglasses

September

September for San Diego County can be sweltering and dry with little rain. Temperatures average in the high 80s F (low 30s C) during the day.

What to wear/what to pack:

  • Skirts
  • Sunscreen lotion
  • Dresses
  • Short sleeve shirts
  • Shorts
  • Sandals
  • Sunglasses
  • If you're going to the beach, bathing suits, swimwear

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:

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

November

If you visit San Diego County during November, you are likely to find that it is crisp. Temperatures tend to hover around the low 60s F (high 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 occasionally.

What to wear/what to pack:

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

December

If you vacation in San Diego County during December, you are likely to find that it is brisk. Temperatures tend to hover around the 50s F (low 10s C) during the day, while at night they can dip into the 30s F (single digits C).

In terms of precipitation, you can expect it to rain or snow/sleet once in a while.

What to wear/what to pack:

  • Jacket or coat
  • Umbrella
  • Waterproof coat
  • Fleeces
  • Socks
  • Standard footwear
  • Light gloves or mittens
  • Waterproof boots
  • Warm pants or jeans

Year-round what to wear/what to pack 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.

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

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