San Mateo, California, United States of America: What to pack, what to wear, and when to go [2022]
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Traveling to San Mateo, California, United States of America? If you're planning to go to San Mateo, this is some important information about when to go, what to wear, and what to pack.
Contents
- When to go to San Mateo
- Important essentials for San Mateo
- Activities for San Mateo
- San Mateo in January: weather and what to pack
- San Mateo in February: weather and what to pack
- San Mateo in March: weather and what to pack
- San Mateo in April: weather and what to pack
- San Mateo in May: weather and what to pack
- San Mateo in June: weather and what to pack
- San Mateo in July: weather and what to pack
- San Mateo in August: weather and what to pack
- San Mateo in September: weather and what to pack
- San Mateo in October: weather and what to pack
- San Mateo in November: weather and what to pack
- San Mateo in December: weather and what to pack

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 Mateo, California, United States of America
Based on the climate and weather in San Mateo, the best time to go is July. See below for details.
Important essentials for San Mateo, California, United States of America
Here are some general tips on what to wear in San Mateo, as well as several items to remember to pack when traveling there.
COVID-19 ESSENTIALS FOR 2022
Travel insurance that includes COVID-19 coverage
Cases are climbing again, and areas are returning to lockdown. If you or a companion get COVID-19, you may be stuck with no way home -- but travel insurance can protect you. Learn more about COVID-19 and travel insurance
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(U.S. Residents) Telehealth COVID-19 test for entry to U.S.
U.S. residents still need a certified COVID-19 test to return home, but it can now be via Zoom. Learn more
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N95 masks
These N95 masks provide the best level of protection you can have.
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Hand sanitizer
This hand sanitizer is a good plane-friendly choice.
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Touchless thermometer
A touchless thermometer is important to have.
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Kids' KN95 masks
N95 masks aren't sold for kids. These are a good alternative (and can also be used by adults if N95 masks are not available).
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Travel disinfecting wipes
Use these to sanitize plane and hotel surfaces.
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A vaccine card protector
Vaccine cards may become worn. An unreadable vaccination card can cause severe consequences. This vaccine card protector helps avoid that.
General health necessities
Don't forget these
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For families with young children
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Power bank for devices
A portable power bank, like this one
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Airplane or car necessities
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Plug adapter
A plug adapter that supports outlet types A and B. This one should work in most places, but you should check with your hotel.
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Money/passport pouch
A money pouch is vital for protecting your passport and credit cards.
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Voice and data SIM card
A SIM card that works in San Mateo. A good global SIM card works in most countries, but check the country list before buying.
What to wear/what to pack for San Mateo, California, United States of America by month
Already know when you're traveling?
January
If you go to San Mateo in January, you will notice that it is crisp and somewhat rainy. Expect it to rain 5-10 days this month. Daytime temperatures are in the 50s F (low 10s C).
What to wear/what to pack:
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Extra socks
-
Long sleeve shirts or blouses
-
Light and heavy skirts
-
Light jacket or fleece
-
Pants or jeans
-
Dresses
-
Standard footwear
-
A rain coat to layer with a coat
-
100% waterproof footwear
We use rain boots:
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Rain pants
These will be a lifesaver in a storm.
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Waterproof phone bag
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Wind resistant umbrella
This one is a great choice.
-
Waterproof bag/luggage cover
So your things stay dry. We recommend:
February
February in San Mateo is chilly and somewhat rainy. The rain can amount to several inches/centimeters. During this time, temperatures average in the 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:
-
Light jacket or fleece
-
Long sleeve shirts or blouses
-
Dresses
-
Light and heavy skirts
-
Extra socks
-
Standard footwear
-
Pants or jeans
-
A rain jacket to layer with a jacket
-
100% waterproof footwear
We like rain boots:
-
Rain pants
Rain pants can be vital in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is an excellent one to buy.
-
Waterproof bag/luggage cover
So your bags stay dry. We suggest:
March
March in San Mateo is crisp and somewhat rainy. The average overnight temperatures in the area are in the 40s F (single digits C). It tends to rain 5-10 days this month. But the colder weather doesn't bring low humidity, which is in the 60% to 70% range on average.
What to wear/what to pack:
-
Extra socks
-
Dresses
-
Long sleeve shirts or blouses
-
Light jacket or fleece
-
Standard footwear
-
Light and heavy skirts
-
Pants or jeans
-
A rain poncho to layer with a coat
-
100% waterproof footwear
We suggest these rain boots:
-
Rain pants
These will be essential in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is a great option.
-
Waterproof bag/luggage cover
So your bags remain dry. We recommend:
April
April is cool. Temperatures average in the 60s F (high 10s C) during the day. It rains occasionally.
What to wear/what to pack:
-
Pants or jeans
-
Light and heavy skirts
-
Light jacket or fleece
-
Extra socks
-
Standard footwear
-
Long sleeve shirts or blouses
-
Dresses
-
A rain coat to layer with a coat
-
100% waterproof footwear
We suggest rain boots:
-
Rain pants
These will be essential in a rainstorm.
-
Waterproof phone bag
-
Windproof umbrella
This one is a great option.
-
Waterproof bag/luggage cover
So your things stay dry. We suggest:
May
May here is mild and dry with little rain. Temperatures average in the high 60s F (high 10s C) during the day.
What to wear/what to pack:
-
Standard footwear
-
Long sleeve shirts or blouses
-
Extra socks
-
Light and heavy skirts
-
Light jacket or fleece
-
Dresses
-
Pants or jeans
-
A rain coat to layer with a coat
-
100% waterproof footwear
We like rain boots:
-
Rain pants
Rain pants will be essential in a rainstorm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your belongings don't get wet. We recommend:
June
If you are traveling to San Mateo in June, you will notice that it is balmy and very dry with almost no rain. Daytime temperatures are in the low 60s F (low 20s C).
What to wear/what to pack:
July
July for San Mateo is mild 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:
-
Bug repellent
-
Sandals
-
Extra socks
-
Light skirts
-
Short pants or heavy shorts
-
Light dresses
You can find some great options here
-
Long and short sleeve shirts
-
Sunscreen lotion
-
Breathable footwear or sandals
August
If you visit San Mateo during August, 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). Humidity is generally between 60 and 70% during the day.
What to wear/what to pack:
-
Breathable footwear or sandals
-
Short pants or heavy shorts
-
Long and short sleeve shirts
-
Light skirts
-
Sandals
-
Bug repellent
-
Extra socks
-
Light dresses
You can find some great options here
-
Sunscreen lotion
September
If you visit San Mateo during September, you will probably see that it is warm and very dry with almost no rain. Temperatures tend to hover around the 70s F (low 20s C) during the day, while at night they can dip into the 50s F (low 10s C). Humidity is generally around 60 during the day.
What to wear/what to pack:
-
Sandals
-
Breathable footwear or sandals
-
Bug repellent
-
Short pants or heavy shorts
-
Extra socks
-
Long and short sleeve shirts
-
Light skirts
-
Light dresses
You can find some great options here
-
Sunscreen lotion
October
If you go to San Mateo in October, you will notice that it is balmy and dry with little rain. Expect it to rain sometimes. Daytime temperatures are in the low 70s F (low 20s C).
What to wear/what to pack:
-
Sandals
-
Bug repellent
-
Sunscreen lotion
-
Light dresses
You can find some great options here
-
Short pants or heavy shorts
-
Extra socks
-
Long and short sleeve shirts
-
Breathable footwear or sandals
-
Light skirts
-
A rain coat to layer with a jacket
-
100% waterproof footwear
We like rain boots:
-
Rain pants
These pants will be essential in heavy rain.
-
Waterproof phone bag
-
Umbrella
This one is an excellent one to buy.
-
Waterproof bag/luggage cover
So your suitcases stay dry. We recommend:
November
November in San Mateo is relatively cool. The rain can amount to several inches/centimeters. During this time, temperatures average in the low 60s F (high 10s C).
What to wear/what to pack:
-
Extra socks
-
Dresses
-
Standard footwear
-
Light and heavy skirts
-
Long sleeve shirts or blouses
-
Pants or jeans
-
Light jacket or fleece
-
A rain poncho to layer with a coat
-
100% waterproof footwear
We recommend rain boots:
-
Rain pants
These pants are vital in a storm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is an excellent option.
-
Waterproof bag/luggage cover
So your suitcases don't get wet. We recommend:
December
December in San Mateo is crisp and somewhat rainy. The average overnight temperatures in the area are in the low 40s F (single digits C). It tends to rain about a third of the time. But the colder weather doesn't bring low humidity, which is in the 60% to 70% range on average.
What to wear/what to pack:
-
Light jacket or fleece
-
Pants or jeans
-
Extra socks
-
Standard footwear
-
Light and heavy skirts
-
Dresses
-
Long sleeve shirts or blouses
-
A rain jacket to layer with another jacket
-
100% waterproof footwear
We recommend rain boots:
-
Rain pants
These are essential in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your things don't get wet. We suggest:
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