Helemano sits near the top of U.S. towns for mild winters
On a normal July day the thermometer tops out near 82°. Expect the heaviest rain or snow in December and the lightest in August. Precipitation is plentiful here, more than falls on almost every U.S. town. The outdoor season runs from January to December, with highs of 76–83°.
A year in Helemano at a glance
Each month’s typical high and low, and what it brings.
What stands out about Helemano’s climate
Compared with towns across the U.S., with Helemano’s place in Hawaii beside it.
What a year in Helemano feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Upper Wahiawa 874.3, HI, 2.6 miles from the town’s center, 100 ft lower.
The 2023 USDA map puts Helemano’s center in zone 12a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 53°. Plant labels use the zone; frost dates tell you when to plant.
About 64 inches of rain a year
December is the wettest month and August the driest. Rain falls on about 237 days a year. Snow is rare: about 0.0" in a normal year at Upper Wahiawa 874.3, HI, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Helemano
0% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Upper Wahiawa 874.3, HI.
Living with Helemano’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 12a. Frost almost never comes, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, July, August, September, October, November and December. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Helemano from natural hazards, river flooding is the largest share (46%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Helemano and similar climates
TownRatings has no climate map of the towns around Helemano yet.
Climates most like Helemano’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Helemano, HI | 61° | 82° | 64" | 0.0" |
| Key Biscayne, FL | 62° | 89° | 61" | 0.0" |
| Cut Off, LA | 46° | 90° | 63" | 0.0" |
| Galveston, TX | 48° | 89° | 52" | 0.1" |
| Gulf Shores, AL | 44° | 90° | 62" | 0.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How Helemano compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Helemano’s place among Hawaii’s.
Helemano weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from Upper Wahiawa 874.3, HI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 76° | 61° | 5.2" | 0.0" | 17 | 0 |
| February | 76° | 60° | 4.3" | 0.0" | 15 | 0 |
| March | 77° | 62° | 6.3" | 0.0" | 17 | 0 |
| April | 77° | 63° | 5.6" | 0.0" | 22 | 0 |
| May | 79° | 65° | 4.3" | 0.0" | 18 | 0 |
| June | 80° | 67° | 4.2" | 0.0" | 22 | 0 |
| July | 82° | 67° | 5.2" | 0.0" | 23 | 0 |
| August | 83° | 68° | 4.0" | 0.0" | 20 | 0 |
| September | 83° | 67° | 4.6" | 0.0" | 19 | 0 |
| October | 82° | 66° | 5.8" | 0.0" | 22 | 0 |
| November | 79° | 65° | 7.1" | 0.0" | 22 | 0 |
| December | 77° | 63° | 7.5" | 0.0" | 20 | 0 |
| Year | 79° | 64° | 64.1" | 0.0" | 237 | 0 |
Where Helemano’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s 1991–2020 normals at the nearest station (NOAA’s grid doesn’t cover Hawaii).
- Snow: Upper Wahiawa 874.3, HI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Upper Wahiawa 874.3, HI, 2.6 miles from the town’s center, 100 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Helemano’s climate
What is the weather like in Helemano?
A typical July afternoon reaches 82°, a January night drops to 61°, and snow is almost unheard of. Milder January nights than all but 89 U.S. towns; cooler July afternoons than 84% of U.S. towns.
How cold does it get in Helemano in winter?
February nights average 60°. A night at 32° or below comes in only some winters (0.0 a year on average).
How much snow does Helemano get?
About 0.0 inches in a normal winter at Upper Wahiawa 874.3, HI, so most winters see none.
How hot does it get in Helemano?
July, with a typical high of 82°. 90° days are rare: none in a normal year at Upper Wahiawa 874.3, HI.
When is the first and last frost in Helemano?
Most years have no frost at all: a 32° night comes in about 0% of winters at Upper Wahiawa 874.3, HI, usually in December or January.
What growing zone is Helemano in?
Zone 12a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 53°.
What is the best time of year to visit Helemano?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, July, August, September, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Neighbors talk weather
Gardens, snow, and the best days of the year in Helemano.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.