Fern Forest, HI climate
Fern Forest has warm winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 77°, a January night drops to 56°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Fern Forest feels like
Winter
Spring
Summer
Fall
Fern Forest weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 74° | 56° | 13.1" | 0 | 17 | 0 |
| February | 72° | 56° | 15.8" | 0 | 20 | 0 |
| March | 73° | 57° | 22.9" | 0 | 26 | 0 |
| April | 73° | 58° | 22.0" | 0 | 28 | 0 |
| May | 75° | 59° | 15.0" | 0 | 25 | 0 |
| June | 76° | 60° | 18.1" | 0 | 27 | 0 |
| July | 77° | 62° | 19.0" | 0 | 28 | 0 |
| August | 77° | 62° | 23.5" | 0 | 29 | 0 |
| September | 78° | 61° | 16.1" | 0 | 26 | 0 |
| October | 77° | 61° | 18.2" | 0 | 27 | 0 |
| November | 75° | 59° | 23.1" | 0 | 25 | 0 |
| December | 74° | 57° | 22.3" | 0 | 23 | 0 |
| Year | 75° | 59° | 229.1" | 0.0" | 301 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more.
Rain and snow in Fern Forest
Fern Forest gets 229 inches of rain and melted snow a year. August is the wettest month and January the driest. Rain or snow falls on about 301 days a year.
A year-round growing season
Heating and cooling a home in Fern Forest
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Fern Forest, 16% of that work is heating and 84% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Fern Forest and its neighbors
Fern Forest borders 3 towns with climate data. January nights across them vary by 6.6°. Royal Hawaiian Estates has the coldest January nights (49°) and Mountain View the hottest July afternoons (77°). Fern Forest’s January low is 56° and its July high 77°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Fern Forest compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Fern Forest’s climate
What is the coldest month in Fern Forest?
February, with a typical high of 72° and a low of 56°.
What is the hottest month in Fern Forest?
September, with a typical high of 78° and a low of 61°.
How much snow does Fern Forest get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Fern Forest?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in Fern Forest?
August, with 23.5 inches of rain and melted snow. The year totals 229 inches.
NOAA’s gridded normals don’t cover this state, so temperatures and rainfall come from the nearest weather station. Snow, frost dates and day counts come from NOAA’s weather station at Glenwood #2 55.4, HI (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.