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

Traveling to Ontario, California, United States of America? If you're planning to go to Ontario, this is 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 Ontario, California, United States of America

Based on the climate and weather in Ontario, the best time to go is May. See below for details.

Important essentials for Ontario, California, United States of America

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

COVID-19 ESSENTIALS FOR 2022


  • 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 protection available.


  • Travel insurance

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


  • 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).


  • A vaccine card protector

    Vaccine cards can wear out. An unreadable card can have severe consequences. This vaccine card protector helps avoid that.


  • Hand sanitizer

    This hand sanitizer is an excellent TSA-friendly choice.

General health necessities

Don't forget these

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

Already know when you're traveling?

January

January in Ontario is balmy. Temperatures average in the 60s F (high 10s C) during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

February

February in Ontario is balmy. Temperatures average in the 60s F (high 10s C) during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

March

Traveling to Ontario in March, you will notice that it is mild. Daytime temperatures are in the low 60s F (low 20s C).

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

April

Traveling to Ontario in April, you will notice that it is warm. Daytime temperatures are in the 70s F (low 20s C).

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

May

May is warm. Temperatures average in the high 70s F (mid 20s C) during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

June

If you are traveling to Ontario in June, you will notice that it is constantly hot. Daytime temperatures are in the 80s F (low 20s C).

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

July

July in Ontario is unbearably hot. Temperatures average in the low 90s F (low 30s C) during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

August

If you visit Ontario during August, you might find that it is a scorcher. Temperatures tend to hover around the 90s F (mid 30s C) during the day, while at night they can dip into the 60s F (high 10s C). Humidity is generally between 30 and 40% during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

September

If you are traveling to Ontario in September, you will notice that it is consistently hot. Daytime temperatures are in the high 80s F (low 30s C).

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

October

Traveling to Ontario in October, you will notice that it is pretty consistently hot. Daytime temperatures are in the low 80s F (high 20s C).

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

November

November in Ontario is mild. The average overnight temperatures in the area are in the high 40s F (single digits C). With the colder weather comes lower humidity, which is in the 30% to 40% range on average.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

December

If you visit Ontario during December, you will probably find that it is balmy. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the low 40s F (single digits C). Humidity is generally between 40 and 50% during the day.

What to wear/what to pack:

If you visit the Museum of History and Art, wear museum-appropriate clothing and take:

Activities for Ontario, California, United States of America

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

Check out our guides for these other locations: Essex, England, United Kingdom, Danube Delta, Romania, Quarto d'Altino, Italy, Bihar, India, Rum, Scotland, United Kingdom, Joshin'etsukogen National Park, Japan, Tulancingo, Puebla, Mexico, Trujillo, Peru, Fort Meade, Florida, United States of America, Annapolis Royal, Nova Scotia, Canada, and Lavaux, Switzerland.