★ January30° · ☂ 18 ★ February30° · ☂ 13 March 31° · ☂ 15 April 31° · ☂ 16 May 32° · ☂ 17 June 31° · ☂ 19 July 31° · ☂ 22 August 31° · ☂ 23 September 31° · ☂ 24 October 31° · ☂ 24 November 31° · ☂ 20 ★ December30° · ☂ 19 Guam in October:hot, rain nearly every day Guam · Records from 2006 to 2025. Not a forecast.
Mean high 31° Hottest day 32° (2020)
Mean low 25° Coldest night 23.5° (2008)
Rain days 24 days 14-29 by year
Rainfall 427mm Daylight 12.0 → 11.7 h
Guam's 12 months i Best: December to February
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Beach Poorfrequent rain and storm risk Sightseeing on foot Poorhot, frequent rain, muggy and storm risk
Humidity 84% 31 muggy days
Clear days 1 day 19 overcast days
Mean wind 21 km/h 3 windy days
Sea temperature 29.8° 29.5-30° by year (last 6)
Sunrise / sunset (15th) 06:11 / 18:02 Daylight 12.0 → 11.7 h
Guam in October The month with the most rainy days. It is humid and heavily clouded, so indoor activities are easier than the beach. The sea is often rough, so confirm water activities on the morning itself.
Highs averaged 31°C and lows stayed at 25°C, so the heat hung on long after sunset. Rain was a regular part of the month, showing up on 24 days on average. It varied a lot from year to year. October 2015 had 14 rain days; 2022 had 29.
With 29 days above 30°C on average, most of the month felt like high summer. Rain days averaged 18 mm each, so when it rained it rained properly.
Typhoons i 6 of the last 20 years had a tropical storm pass within 300 km this month.
Mirinae (2009), 101 km away tropical storm Vongfong (2014), 116 km away typhoon strength Bolaven (2023), 130 km away typhoon strength 1 1 2 1 3 2 4 3 5 1 6 3 7 4 8 4 9 6 10 4 11 1 12
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
October 1 Thursday 1 rain in 20 of 20 yrs 20/20 31° 24° October 2 Friday 2 rain in 18 of 20 yrs 18/20 31° 24° October 3 Saturday 3 rain in 16 of 20 yrs 16/20 31° 25° 1-3 rain on 90% of days 31° 25°
October 4 Sunday 4 rain in 16 of 20 yrs 16/20 31° 25° October 5 Monday 5 rain in 16 of 20 yrs 16/20 31° 25° October 6 Tuesday 6 rain in 18 of 20 yrs 18/20 31° 25° October 7 Wednesday 7 rain in 18 of 20 yrs 18/20 31° 25° October 8 Thursday 8 rain in 16 of 20 yrs 16/20 31° 25° October 9 Friday 9 rain in 18 of 20 yrs 18/20 31° 24° October 10 Saturday 10 rain in 15 of 20 yrs 15/20 31° 25° 4-10 rain on 84% of days 31° 25°
October 11 Sunday 11 rain in 16 of 20 yrs 16/20 31° 25° October 12 Monday 12 rain in 16 of 20 yrs 16/20 31° 25° October 13 Tuesday 13 rain in 14 of 20 yrs 14/20 31° 25° October 14 Wednesday 14 rain in 16 of 20 yrs 16/20 31° 25° October 15 Thursday 15 rain in 20 of 20 yrs 20/20 31° 24° October 16 Friday 16 rain in 14 of 20 yrs 14/20 31° 25° October 17 Saturday 17 rain in 17 of 20 yrs 17/20 31° 25° 11-17 rain on 81% of days 31° 25°
October 18 Sunday 18 rain in 14 of 20 yrs 14/20 31° 25° October 19 Monday 19 rain in 15 of 20 yrs 15/20 31° 25° October 20 Tuesday 20 rain in 16 of 20 yrs 16/20 31° 25° October 21 Wednesday 21 rain in 15 of 20 yrs 15/20 31° 25° October 22 Thursday 22 rain in 16 of 20 yrs 16/20 31° 25° October 23 Friday 23 rain in 13 of 20 yrs 13/20 31° 25° October 24 Saturday 24 rain in 12 of 20 yrs 12/20 31° 25° 18-24 rain on 72% of days 31° 25°
October 25 Sunday 25 rain in 14 of 20 yrs 14/20 31° 25° October 26 Monday 26 rain in 13 of 20 yrs 13/20 31° 25° October 27 Tuesday 27 rain in 16 of 20 yrs 16/20 31° 25° October 28 Wednesday 28 rain in 15 of 20 yrs 15/20 31° 25° October 29 Thursday 29 rain in 15 of 20 yrs 15/20 31° 25° October 30 Friday 30 rain in 13 of 20 yrs 13/20 31° 25° October 31 Saturday 31 rain in 13 of 20 yrs 13/20 31° 25° 25-31 rain on 71% of days 31° 25°
Rain was common on almost every date this month, so the shades compare dates within this month.
1-3 rain on 90% of days 31° 25° 4-10 rain on 84% of days 31° 25° 11-17 rain on 81% of days 31° 25° 18-24 rain on 72% of days 31° 25° 25-31 rain on 71% of days 31° 25°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
October 1 Friday 1 rain in 20 of 20 yrs 20/20 31° 24° October 2 Saturday 2 rain in 18 of 20 yrs 18/20 31° 24° 1-2 rain on 95% of days 31° 24°
October 3 Sunday 3 rain in 16 of 20 yrs 16/20 31° 25° October 4 Monday 4 rain in 16 of 20 yrs 16/20 31° 25° October 5 Tuesday 5 rain in 16 of 20 yrs 16/20 31° 25° October 6 Wednesday 6 rain in 18 of 20 yrs 18/20 31° 25° October 7 Thursday 7 rain in 18 of 20 yrs 18/20 31° 25° October 8 Friday 8 rain in 16 of 20 yrs 16/20 31° 25° October 9 Saturday 9 rain in 18 of 20 yrs 18/20 31° 24° 3-9 rain on 84% of days 31° 25°
October 10 Sunday 10 rain in 15 of 20 yrs 15/20 31° 25° October 11 Monday 11 rain in 16 of 20 yrs 16/20 31° 25° October 12 Tuesday 12 rain in 16 of 20 yrs 16/20 31° 25° October 13 Wednesday 13 rain in 14 of 20 yrs 14/20 31° 25° October 14 Thursday 14 rain in 16 of 20 yrs 16/20 31° 25° October 15 Friday 15 rain in 20 of 20 yrs 20/20 31° 24° October 16 Saturday 16 rain in 14 of 20 yrs 14/20 31° 25° 10-16 rain on 79% of days 31° 25°
October 17 Sunday 17 rain in 17 of 20 yrs 17/20 31° 25° October 18 Monday 18 rain in 14 of 20 yrs 14/20 31° 25° October 19 Tuesday 19 rain in 15 of 20 yrs 15/20 31° 25° October 20 Wednesday 20 rain in 16 of 20 yrs 16/20 31° 25° October 21 Thursday 21 rain in 15 of 20 yrs 15/20 31° 25° October 22 Friday 22 rain in 16 of 20 yrs 16/20 31° 25° October 23 Saturday 23 rain in 13 of 20 yrs 13/20 31° 25° 17-23 rain on 76% of days 31° 25°
October 24 Sunday 24 rain in 12 of 20 yrs 12/20 31° 25° October 25 Monday 25 rain in 14 of 20 yrs 14/20 31° 25° October 26 Tuesday 26 rain in 13 of 20 yrs 13/20 31° 25° October 27 Wednesday 27 rain in 16 of 20 yrs 16/20 31° 25° October 28 Thursday 28 rain in 15 of 20 yrs 15/20 31° 25° October 29 Friday 29 rain in 15 of 20 yrs 15/20 31° 25° October 30 Saturday 30 rain in 13 of 20 yrs 13/20 31° 25° 24-30 rain on 70% of days 31° 25°
October 31 Sunday 31 rain in 13 of 20 yrs 13/20 31° 25°
October 31 rain on 65% of days 31° 25°
Rain was common on almost every date this month, so the shades compare dates within this month.
1-2 rain on 95% of days 31° 24° 3-9 rain on 84% of days 31° 25° 10-16 rain on 79% of days 31° 25° 17-23 rain on 76% of days 31° 25° 24-30 rain on 70% of days 31° 25° October 31 rain on 65% of days 31° 25°
Tap another date to change
2006 30mm
2007 19mm
2008 7mm
2009 28mm
2010 4mm
2011 15mm
2012 90mm
2013 18mm
2014 12mm
2015 6mm
2016 12mm
2017 10mm
2018 11mm
2019 1mm
2020 55mm
2021 19mm
2022 21mm
2023 6mm
2024 2mm
2025 11mm
Holidays in October (2026) 1 US holidays (flights fill up)
Holidays in October (2027) 1 US holidays (flights fill up)
Your trip dates, the past 20 years Trip dates October 1 (Thu) 2 (Fri) 3 (Sat) 4 (Sun) 5 (Mon) 6 (Tue) 7 (Wed) 8 (Thu) 9 (Fri) 10 (Sat) 11 (Sun) 12 (Mon) 13 (Tue) 14 (Wed) 15 (Thu) 16 (Fri) 17 (Sat) 18 (Sun) 19 (Mon) 20 (Tue) 21 (Wed) 22 (Thu) 23 (Fri) 24 (Sat) 25 (Sun) 26 (Mon) 27 (Tue) 28 (Wed) 29 (Thu) 30 (Fri) 31 (Sat) ~ October 1 (Thu) 2 (Fri) 3 (Sat) 4 (Sun) 5 (Mon) 6 (Tue) 7 (Wed) 8 (Thu) 9 (Fri) 10 (Sat) 11 (Sun) 12 (Mon) 13 (Tue) 14 (Wed) 15 (Thu) 16 (Fri) 17 (Sat) 18 (Sun) 19 (Mon) 20 (Tue) 21 (Wed) 22 (Thu) 23 (Fri) 24 (Sat) 25 (Sun) 26 (Mon) 27 (Tue) 28 (Wed) 29 (Thu) 30 (Fri) 31 (Sat) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Trip rain days Month rain days Tap a date to start, tap another to end. Each cell is that date in one year. '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25
of 20 10 Sat Pick October 10
15 11 Sun Pick October 11
16 12 Mon Pick October 12
16 13 Tue Pick October 13
14 14 Wed Pick October 14
16 15 Thu Pick October 15
20 16 Fri Pick October 16
14 17 Sat Pick October 17
17 18 Sun Pick October 18
14 19 Mon Pick October 19
15 20 Tue Pick October 20
16 21 Wed Pick October 21
15 22 Thu Pick October 22
16 23 Fri Pick October 23
13 24 Sat Pick October 24
12 25 Sun Pick October 25
14 26 Mon Pick October 26
13 27 Tue Pick October 27
16 28 Wed Pick October 28
15 29 Thu Pick October 29
15 30 Fri Pick October 30
13 31 Sat Pick October 31
13 Dates outside your trip are dimmed.
One row per year, one cell per day. 2015 had 14 rain days, 2022 had 29.
Guam through the year Month High Low Rain days Rainfall Sea January Good 30° 24° 18 days 163mm 29° February Good 30° 24° 13 days 100mm 28° March 31° 24° 15 days 91mm 28° April 31° 25° 16 days 104mm 29° May 32° 25° 17 days 139mm 29° June 31° 25° 19 days 155mm 30° July 31° 25° 22 days 314mm 30° August 31° 25° 23 days 451mm 30° September 31° 25° 24 days 444mm 30° October 31° 25° 24 days 427mm 30° November 31° 25° 20 days 186mm 30° December Good 30° 25° 19 days 121mm 29°
What to pack Loose, light-colored clothes, sandals and a hat did most of the work at 31°C. Sights went in the morning, with a break in the middle of the day.
With rain every other day, a waterproof jacket is a necessity, not extra luggage. One compact umbrella is enough besides.
Common questions Does it rain a lot in Guam in October? Over the past 20 years October averaged 24 rain days (1 mm or more) out of 31. Individual years ran from 14 in the driest to 29 in the wettest.
What should I wear in Guam in October? Days averaged 31°C and nights 25°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.
Can you swim in Guam in October? Sea surface temperature averaged 29.8°C in October, warm enough to stay in for a long swim. Year to year it ranged 29.5-30°C. Check local flags for waves and jellyfish on the day.
Is October a good time to visit Guam? On warmth and rain days alone, Guam's easiest months were December to February. October ranked 7 of 12.
Is Guam humid in October? Mean relative humidity was 84%, with about 31 muggy days (dew point of 20°C or more) in the month.
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