Photo: The original uploader was Tijuana Brass at English Wikipedia. · CC BY-SA 3.0Hardly any U.S. towns see softer January nights than Waimanalo
The warmest part of a July day comes in at 84° on average. A year here swings 21° from midwinter lows to midsummer highs. From November to June, highs of 78–83° make it easy to spend the day outdoors.
A year in Waimanalo at a glance
Each month’s typical high and low, and what it brings.
What stands out about Waimanalo’s climate
Compared with towns across the U.S., with Waimanalo’s place in Hawaii beside it.
What a year in Waimanalo 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 Waimanalo Exp F 795.1, HI, 1.3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Waimanalo’s center in zone 12b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 58°. Plant labels use the zone; frost dates tell you when to plant.
About 42 inches of rain a year
December is the wettest month and June the driest. Rain falls on about 169 days a year. Snow is rare: about 0.0" in a normal year at Waimanalo Exp F 795.1, HI, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Waimanalo
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 Waimanalo Exp F 795.1, HI.
Living with Waimanalo’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 12b. 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, November and December. 6.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Waimanalo from natural hazards, river flooding is the largest share (74%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Waimanalo and its neighbors
Every town next door is within a degree of Waimanalo in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Waimanalo’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 |
|---|---|---|---|---|
| Waimanalo, HI | 65° | 84° | 42" | 0.0" |
| Islamorada, Village of Islands, FL | 64° | 89° | 45" | 0.0" |
| Galveston, TX | 48° | 89° | 52" | 0.1" |
| Topanga, CA | 48° | 84° | 20" | 0.0" |
| St. Simons, GA | 43° | 91° | 49" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
How Waimanalo compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Waimanalo’s place among Hawaii’s.
Waimanalo weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from Waimanalo Exp F 795.1, HI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 78° | 65° | 4.8" | 0.0" | 16 | 0 |
| February | 78° | 65° | 4.5" | 0.0" | 13 | 0 |
| March | 79° | 67° | 5.4" | 0.0" | 15 | 0 |
| April | 80° | 69° | 3.3" | 0.0" | 13 | 0 |
| May | 81° | 70° | 2.4" | 0.0" | 12 | 0 |
| June | 83° | 73° | 1.3" | 0.0" | 11 | 0 |
| July | 84° | 74° | 1.9" | 0.0" | 15 | 0 |
| August | 85° | 74° | 2.0" | 0.0" | 13 | 0 |
| September | 85° | 74° | 2.6" | 0.0" | 13 | 0 |
| October | 84° | 73° | 3.5" | 0.0" | 14 | 0 |
| November | 82° | 71° | 5.4" | 0.0" | 16 | 0 |
| December | 79° | 68° | 5.5" | 0.0" | 19 | 0 |
| Year | 82° | 70° | 42.4" | 0.0" | 169 | 0 |
Where Waimanalo’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: Waimanalo Exp F 795.1, HI (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Waimanalo Exp F 795.1, HI, 1.3 miles from the town’s center, at about the same height; 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 Waimanalo’s climate
What is the weather like in Waimanalo?
A typical July afternoon reaches 84°, a January night drops to 65°, and snow is almost unheard of. Milder January nights than all but 32 U.S. towns; cooler July afternoons than 56% of U.S. towns.
How cold does it get in Waimanalo in winter?
January nights average 65°. A night at 32° or below comes in only some winters (0.0 a year on average).
How much snow does Waimanalo get?
About 0.0 inches in a normal winter at Waimanalo Exp F 795.1, HI, so most winters see none.
How hot does it get in Waimanalo?
July, with a typical high of 84°. 90° days are rare: none in a normal year at Waimanalo Exp F 795.1, HI.
When is the first and last frost in Waimanalo?
Most years have no frost at all: a 32° night comes in about 0% of winters at Waimanalo Exp F 795.1, HI, usually in December or January.
What growing zone is Waimanalo in?
Zone 12b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 58°.
What is the best time of year to visit Waimanalo?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, 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 Waimanalo.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.