Northern Mariana Islands Saipan Weather in December — Climate Guide
December in Saipan is high
Saipan Weather in December — Quick Answer
As of 2026- Avg temp
- 29° / 24°
- Rainfall
- 120mm · 12 days
- Crowds
- Busy
As of 2026, Saipan in December averages a high of 29°C and low of 24°C with 120mm of rain over about 12 days. Pleasant dry-season warmth. Light clothing, swimwear, reef-safe SPF 50, hat, sunglasses, and a light layer for boats and breezy evenings.
December is high for Saipan.
December brings the return of the more reliable dry season — warm 24-29°C days, lighter rain, and steady trade winds. Conditions for beaches, snorkeling, and diving improve markedly.
The Christmas-New Year window is the busiest and priciest of the year, so book early, especially given the limited flights.
Travel score
Saipan December Weather Stats
Avg High
29°C
Avg Low
24°C
Rainy Days
12
120mm total
Sunshine
7h
Daily avg
Humidity
78%
comfortable
UV Index
10
Very high
Wind
18 km/h
Gusts 30
Sea Temp
27°C
warm — ideal
Crowds
Busy
At attractions
December Sunrise & Sunset
Air Quality
PM2.5
8 μg/m³
PM10
16 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
33°C
Nighttime
25°C
Humidity and wind affect how the actual temperature feels.
Wind
18 km/h
Max gust 30 km/h
Activities Recommended for December
December Travel Pros & Cons
Pros
- Dry-season weather returns
- Good dive visibility
- Calm Managaha lagoon
- Comfortable trade winds
Cons
- Christmas/New Year peak prices
- High UV
- Limited flights require early booking
December Events & Festivals
- Return of dry-season trade winds
- Christmas & New Year peak
- Sea ~27°C
Saipan in December — Full Picture
December brings the return of the more reliable dry season — warm 24-29°C days, lighter rain, and steady trade winds. Conditions for beaches, snorkeling, and diving improve markedly.
The Christmas-New Year window is the busiest and priciest of the year, so book early, especially given the limited flights.
Dive visibility recovers and the Grotto is good on calm mornings; Managaha's lagoon is calm and clear.
UV stays high near the equator — reef-safe sunscreen and shade remain essential even with the comfortable breeze.
What to Wear & What to Pack
Pleasant dry-season warmth. Light clothing, swimwear, reef-safe SPF 50, hat, sunglasses, and a light layer for boats and breezy evenings.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
30.3°C
24.7°C
9/mo
Summer (Jun·Jul·Aug)
31°C
25°C
15.7/mo
Autumn (Sep·Oct·Nov)
30.7°C
25°C
16.3/mo
Winter (Dec·Jan·Feb)
Current29°C
24°C
10.7/mo
Saipan Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 29° | 24° | 11d·110mm | 7h | 78% | 10 | Busy | Peak |
| February (Best) | 29° | 24° | 9d·80mm | 8h | 77% | 10 | Busy | Peak |
| March (Best) | 30° | 24° | 8d·70mm | 8h | 77% | 11 | Busy | Peak |
| 30° | 25° | 8d·80mm | 8h | 77% | 11 | Moderate | Shoulder | |
| 31° | 25° | 11d·120mm | 7h | 78% | 11 | Moderate | Shoulder | |
| 31° | 25° | 13d·130mm | 7h | 79% | 11 | Quiet | Shoulder | |
| 31° | 25° | 16d·180mm | 6h | 80% | 11 | Moderate | Shoulder | |
| 31° | 25° | 18d·230mm | 6h | 81% | 11 | Moderate | Shoulder | |
| 31° | 25° | 18d·220mm | 6h | 81% | 11 | Quiet | Low season | |
| 31° | 25° | 17d·200mm | 6h | 80% | 11 | Quiet | Low season | |
| 30° | 25° | 14d·150mm | 7h | 79% | 10 | Moderate | Shoulder | |
| 29° | 24° | 12d·120mm | 7h | 78% | 10 | Busy | Peak |
View Other Months
Saipan December Hotel Picks
Frequently Asked Questions
Is December a good time to visit Saipan?
Saipan in December is high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Saipan in December?
Saipan December averages a high of 29°C and a low of 24°C.
Does it rain much in Saipan in December?
Saipan December averages 120mm of rainfall over about 12 rainy days.
What should I wear in Saipan in December?
Pleasant dry-season warmth. Light clothing, swimwear, reef-safe SPF 50, hat, sunglasses, and a light layer for boats and breezy evenings.
What time are sunrise and sunset in Saipan in December?
Saipan December sunrise is 06:20 and sunset is 17:55, with 11h 35min of daylight.
What's the air quality like in Saipan in December?
Saipan December air quality (AQI) averages 25, rated Good. PM2.5 averages 8μg/m³.
What activities are recommended in Saipan in December?
In December, Saipan is great for Managaha snorkeling, Grotto diving (certified), WWII memorial loop.
Is December peak season in Saipan?
Saipan December crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Saipan
View Other Months
Planning a December trip to Saipan?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.