Saipan in Summer
In summer (June, July and August), Saipan sees average daytime highs around 28°C and overnight lows near 27°C, with 664 mm of rain over about 73 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 20% of the time across summer, and the air most often feels miserable.
Summer is Saipan's weakest season of the year to visit on our travel score. Saipan has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Saipan's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 664 mm
- 73 wet days
- Avg wind
- 20 km/h
- Travel score
- 3.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Saipan in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Saipan reaches about 28°C and drops to 27°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Saipan
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Saipan weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 26° | 61 | 13.3 | 11.2 | 6.2 |
| Feb | 27° / 26° | 39 | 11.3 | 11.5 | 6.5 |
| Mar | 27° / 26° | 38 | 9.8 | 11.9 | 6.9 |
| Apr | 27° / 26° | 50 | 10.4 | 12.3 | 6.7 |
| May | 28° / 27° | 64 | 13.2 | 12.7 | 6.0 |
| Jun | 28° / 27° | 100 | 17.9 | 12.9 | 4.7 |
| Jul | 28° / 27° | 223 | 27 | 12.8 | 3.5 |
| Aug | 28° / 26° | 340 | 28.2 | 12.5 | 3.3 |
| Sep | 28° / 26° | 298 | 26.6 | 12.1 | 3.4 |
| Oct | 28° / 27° | 304 | 25.6 | 11.7 | 3.8 |
| Nov | 28° / 27° | 133 | 19 | 11.3 | 4.9 |
| Dec | 28° / 26° | 67 | 14.8 | 11.1 | 6.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 20% of the time across summer.
Chance of precipitation in Summer
Saipan gets around 664 mm of rain over 73 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 20 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 48 min in early June to 12 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Hazard calendar for Saipan
In summer, Saipan overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Saipan sits in the Pacific typhoon belt; the season peaks July–October.
Saipan's monsoon runs July–October, when most of the year's rain falls.
Is summer a good time to visit Saipan?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Saipan.
What to pack for Saipan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Saipan sees daytime highs around 28°C and nights near 27°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 73 days see rain.
Sea temperature near Saipan in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in September at about 30°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 27 | 27 | 28 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Warm |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Saipan in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Saipan peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 11 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 12 | 10 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Very high |
| Dec | 8 | Very high |
Where is Saipan?
Saipan sits at 15.2°N, 145.8°E, 5 m above sea level, in Northern Mariana Islands. The nearest listed city is Yigo Village, 208 km away.
Topography around Saipan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saipan.
Within 3 km, the terrain around Saipan has significant variations in elevation — a maximum elevation change of 454 m around an average of 123 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 454 m; within 80 km, significant variations in elevation — a maximum elevation change of 446 m.
The land around Saipan is covered by trees (74%) within 3 km, water (86%) within 16 km, and water (97%) within 80 km.
Northern Mariana Islands travel facts
- GDP per capita
- $23,786
- 2022
- Safe drinking water
- 81%
- of population, 2024
- Income group
- High
- World Bank
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Saipan (15.2123°, 145.7545°, elevation 5 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.