The best times to visit St Helena for ideal weather are

April 23rd to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other St Helena Travel Info

Weather in St Helena


Average temperatures in St Helena vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 44th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit St Helena, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 89.8°F (32.1°C) with temperatures rarely dropping below 51°F (10.6°C) at night.

St Helena Temperatures (Fahrenheit)


St Helena Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

St Helena Perceived Temperature (F)


St Helena Perceived Temperature (C)



Average St Helena Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 60.9 46 35.2
Feb 63.1 49.2 38.9
Mar 67.3 52.3 40.9
Apr 71.6 55.3 42.5
May 76.9 59.6 46
Jun 83.1 64.2 49.5
Jul 83.6 64.4 51.9
Aug 84.5 64.3 51.8
Sep 84.9 63.8 49.5
Oct 78.1 59.4 46.5
Nov 67.6 51.9 40.1
Dec 58.6 46.3 37.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 16.1 7.8 1.8
Feb 17.3 9.6 3.8
Mar 19.6 11.3 4.9
Apr 22 12.9 5.8
May 24.9 15.3 7.8
Jun 28.4 17.9 9.7
Jul 28.7 18 11.1
Aug 29.2 17.9 11
Sep 29.4 17.7 9.7
Oct 25.6 15.2 8.1
Nov 19.8 11.1 4.5
Dec 14.8 7.9 2.8



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in St Helena are July, August, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid June. For example, on the week of June 11th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 3 days of significant precipitation the week of December 17th.

When can you find snow in St Helena? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in St Helena.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in St Helena (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 16% 0 3.9
Feb 25% 0 5.4
Mar 17% 0 3.1
Apr 12% 0 1.7
May 7% 0 0.9
Jun 3% 0 0.4
Jul 0% 0 0
Aug 0% 0 0
Sep 3% 0 0.3
Oct 9% 0 1.8
Nov 16% 0 2.5
Dec 29% 0 6.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 16 0 9.9
Feb 25 0 13.7
Mar 17 0 7.9
Apr 12 0 4.3
May 7 0 2.3
Jun 3 0 1
Jul 0 0 0
Aug 0 0 0
Sep 3 0 0.8
Oct 9 0 4.6
Nov 16 0 6.4
Dec 29 0 16


Humidity and Wind

St Helena has some very humid months, with other comfortably humid months. The least humid month is June (51.3% relative humidity), and the most humid month is December (74.1%).

Wind in St Helena is usually extremely calm. The windiest month is May, followed by April and June. May’s average wind speed of around 5 knots (5.8 MPH or 9.3 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late May where average top sustained speeds reach 13.6 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in St Helena.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 2.6 Barely noticeable 7.9 Gentle breeze
Feb 3.7 Barely noticeable 10.1 Gentle breeze
Mar 4 Light breeze 11 Gentle breeze
Apr 4.8 Light breeze 12.2 Significant breeze
May 5 Light breeze 12.5 Gentle breeze
Jun 4.7 Light breeze 11.9 Significant breeze
Jul 4.5 Light breeze 11.3 Gentle breeze
Aug 4 Light breeze 10.9 Gentle breeze
Sep 3.3 Barely noticeable 10.1 Gentle breeze
Oct 3.1 Barely noticeable 9.2 Gentle breeze
Nov 2.8 Barely noticeable 8.6 Gentle breeze
Dec 2.9 Barely noticeable 8.7 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 71.4%
Feb 70.2%
Mar 64%
Apr 55.6%
May 53%
Jun 51.3%
Jul 58%
Aug 58.2%
Sep 54.3%
Oct 58.5%
Nov 67.2%
Dec 74.1%


Is it Safe to Travel to St Helena?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in St Helena, CA, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit St Helena in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 36.3 in December means 36.3% of the tourists vs. July.



Overall St Helena Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 78.7°F (25.9°C) and 63.6°F (17.6°C) with warmer temperatures in the later months. Rain is rare with 2 to 5 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in St Helena, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 86.6°F (30.3°C) and 63.6°F (17.6°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 1 to 5 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in St Helena to be enjoyable for warm weather travelers. The average high during this season is between 64.3°F (17.9°C) and 57.1°F (13.9°C). On average, it rains or snows a fair amount: 5 to 9 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › St Helena, CA, US