★ 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 June:seriously hot, rain on every second day Guam · Records from 2006 to 2025. Not a forecast.
Mean high 31° Hottest day 32.5° (2014)
Mean low 25° Coldest night 23.7° (2008)
Rain days 19 days 8-26 by year
Rainfall 155mm Daylight 12.9 → 12.9 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 Sightseeing on foot Poorhot, frequent rain and muggy
Humidity 82% 30 muggy days
Clear days 4 days 10 overcast days
Mean wind 21 km/h 1 windy day
Sea temperature 29.5° 29.1-29.8° by year (last 6)
Sunrise / sunset (15th) 05:54 / 18:48 Daylight 12.9 → 12.9 h
Guam in June The changeover from dry to wet. Humidity climbs and afternoon showers increase, though the sea is still good. Start keeping an eye on typhoon news. Splitting the day into outdoors in the morning and indoors in the afternoon works well.
Guam in June ran hot: 31°C by day and 25°C at night. By midday the shade was the best seat in town. The month averaged 19 rain days. Carry an umbrella. Year to year it swung widely, from 8 rain days in 2019 to 26 in 2018.
Highs topped 30°C on 30 days of the month on average. Mixing in indoor stops at midday made sense.
Typhoons i 1 of the last 20 years had a tropical storm pass within 300 km this month.
Champi (2021), 129 km away tropical storm 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
June 1 Tuesday 1 rain in 9 of 20 yrs 9/20 31° 26° June 2 Wednesday 2 rain in 12 of 20 yrs 12/20 31° 25° June 3 Thursday 3 rain in 13 of 20 yrs 13/20 31° 25° June 4 Friday 4 rain in 13 of 20 yrs 13/20 31° 25° June 5 Saturday 5 rain in 12 of 20 yrs 12/20 31° 26° 1-5 rain on 59% of days 31° 25°
June 6 Sunday 6 rain in 10 of 20 yrs 10/20 31° 26° June 7 Monday 7 rain in 9 of 20 yrs 9/20 31° 26° June 8 Tuesday 8 rain in 7 of 20 yrs 7/20 31° 26° June 9 Wednesday 9 rain in 11 of 20 yrs 11/20 31° 26° June 10 Thursday 10 rain in 12 of 20 yrs 12/20 31° 26° June 11 Friday 11 rain in 10 of 20 yrs 10/20 32° 26° June 12 Saturday 12 rain in 11 of 20 yrs 11/20 32° 26° 6-12 rain on 50% of days 31° 26°
June 13 Sunday 13 rain in 12 of 20 yrs 12/20 32° 26° June 14 Monday 14 rain in 13 of 20 yrs 13/20 32° 26° June 15 Tuesday 15 rain in 11 of 20 yrs 11/20 32° 26° June 16 Wednesday 16 rain in 9 of 20 yrs 9/20 32° 26° June 17 Thursday 17 rain in 13 of 20 yrs 13/20 31° 25° June 18 Friday 18 rain in 10 of 20 yrs 10/20 31° 25° June 19 Saturday 19 rain in 16 of 20 yrs 16/20 31° 25° 13-19 rain on 60% of days 32° 26°
June 20 Sunday 20 rain in 11 of 20 yrs 11/20 31° 25° June 21 Monday 21 rain in 14 of 20 yrs 14/20 31° 25° June 22 Tuesday 22 rain in 13 of 20 yrs 13/20 31° 25° June 23 Wednesday 23 rain in 15 of 20 yrs 15/20 31° 25° June 24 Thursday 24 rain in 14 of 20 yrs 14/20 31° 25° June 25 Friday 25 rain in 14 of 20 yrs 14/20 31° 25° June 26 Saturday 26 rain in 15 of 20 yrs 15/20 31° 25° 20-26 rain on 69% of days 31° 25°
June 27 Sunday 27 rain in 16 of 20 yrs 16/20 31° 25° June 28 Monday 28 rain in 17 of 20 yrs 17/20 31° 25° June 29 Tuesday 29 rain in 18 of 20 yrs 18/20 31° 25° June 30 Wednesday 30 rain in 18 of 20 yrs 18/20 31° 25°
27-30 rain on 86% of days 31° 25°
1-5 rain on 59% of days 31° 25° 6-12 rain on 50% of days 31° 26° 13-19 rain on 60% of days 32° 26° 20-26 rain on 69% of days 31° 25° 27-30 rain on 86% of days 31° 25°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
June 1 Thursday 1 rain in 9 of 20 yrs 9/20 31° 26° June 2 Friday 2 rain in 12 of 20 yrs 12/20 31° 25° June 3 Saturday 3 rain in 13 of 20 yrs 13/20 31° 25° 1-3 rain on 57% of days 31° 25°
June 4 Sunday 4 rain in 13 of 20 yrs 13/20 31° 25° June 5 Monday 5 rain in 12 of 20 yrs 12/20 31° 26° June 6 Tuesday 6 rain in 10 of 20 yrs 10/20 31° 26° June 7 Wednesday 7 rain in 9 of 20 yrs 9/20 31° 26° June 8 Thursday 8 rain in 7 of 20 yrs 7/20 31° 26° June 9 Friday 9 rain in 11 of 20 yrs 11/20 31° 26° June 10 Saturday 10 rain in 12 of 20 yrs 12/20 31° 26° 4-10 rain on 53% of days 31° 26°
June 11 Sunday 11 rain in 10 of 20 yrs 10/20 32° 26° June 12 Monday 12 rain in 11 of 20 yrs 11/20 32° 26° June 13 Tuesday 13 rain in 12 of 20 yrs 12/20 32° 26° June 14 Wednesday 14 rain in 13 of 20 yrs 13/20 32° 26° June 15 Thursday 15 rain in 11 of 20 yrs 11/20 32° 26° June 16 Friday 16 rain in 9 of 20 yrs 9/20 32° 26° June 17 Saturday 17 rain in 13 of 20 yrs 13/20 31° 25° 11-17 rain on 56% of days 32° 26°
June 18 Sunday 18 rain in 10 of 20 yrs 10/20 31° 25° June 19 Monday 19 rain in 16 of 20 yrs 16/20 31° 25° June 20 Tuesday 20 rain in 11 of 20 yrs 11/20 31° 25° June 21 Wednesday 21 rain in 14 of 20 yrs 14/20 31° 25° June 22 Thursday 22 rain in 13 of 20 yrs 13/20 31° 25° June 23 Friday 23 rain in 15 of 20 yrs 15/20 31° 25° June 24 Saturday 24 rain in 14 of 20 yrs 14/20 31° 25° 18-24 rain on 66% of days 31° 25°
June 25 Sunday 25 rain in 14 of 20 yrs 14/20 31° 25° June 26 Monday 26 rain in 15 of 20 yrs 15/20 31° 25° June 27 Tuesday 27 rain in 16 of 20 yrs 16/20 31° 25° June 28 Wednesday 28 rain in 17 of 20 yrs 17/20 31° 25° June 29 Thursday 29 rain in 18 of 20 yrs 18/20 31° 25° June 30 Friday 30 rain in 18 of 20 yrs 18/20 31° 25°
25-30 rain on 82% of days 31° 25°
1-3 rain on 57% of days 31° 25° 4-10 rain on 53% of days 31° 26° 11-17 rain on 56% of days 32° 26° 18-24 rain on 66% of days 31° 25° 25-30 rain on 82% of days 31° 25°
Tap another date to change
2006 5mm
2007 none
2008 3mm
2009 3mm
2010 6mm
2011 1mm
2012 11mm
2013 7mm
2014 6mm
2015 1mm
2016 3mm
2017 44mm
2018 8mm
2019 none
2020 8mm
2021 13mm
2022 1mm
2023 9mm
2024 8mm
2025 14mm
Holidays in June (2027) June 18 Juneteenth (observed)June 19 Juneteenth National Independence Day 1 US holidays (flights fill up)
Your trip dates, the past 20 years Trip dates June 1 (Tue) 2 (Wed) 3 (Thu) 4 (Fri) 5 (Sat) 6 (Sun) 7 (Mon) 8 (Tue) 9 (Wed) 10 (Thu) 11 (Fri) 12 (Sat) 13 (Sun) 14 (Mon) 15 (Tue) 16 (Wed) 17 (Thu) 18 (Fri) 19 (Sat) 20 (Sun) 21 (Mon) 22 (Tue) 23 (Wed) 24 (Thu) 25 (Fri) 26 (Sat) 27 (Sun) 28 (Mon) 29 (Tue) 30 (Wed) ~ June 1 (Tue) 2 (Wed) 3 (Thu) 4 (Fri) 5 (Sat) 6 (Sun) 7 (Mon) 8 (Tue) 9 (Wed) 10 (Thu) 11 (Fri) 12 (Sat) 13 (Sun) 14 (Mon) 15 (Tue) 16 (Wed) 17 (Thu) 18 (Fri) 19 (Sat) 20 (Sun) 21 (Mon) 22 (Tue) 23 (Wed) 24 (Thu) 25 (Fri) 26 (Sat) 27 (Sun) 28 (Mon) 29 (Tue) 30 (Wed) 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
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 Dates outside your trip are dimmed.
One row per year, one cell per day. 2019 had 8 rain days, 2018 had 26.
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 At 31°C by day and 25°C at night with humid air, sweat hardly dried. Quick-dry fabrics beat heavy cotton, and a spare top saved the evening.
Wet pavements were the norm: shoes you do not mind soaking, a jacket with a real hood, and a plastic bag to keep your phone and passport dry.
Common questions Does it rain a lot in Guam in June? Over the past 20 years June averaged 19 rain days (1 mm or more) out of 30. Individual years ran from 8 in the driest to 26 in the wettest.
What should I wear in Guam in June? 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 June? Sea surface temperature averaged 29.5°C in June, warm enough to stay in for a long swim. Year to year it ranged 29.1-29.8°C. Check local flags for waves and jellyfish on the day.
Is June a good time to visit Guam? On warmth and rain days alone, Guam's easiest months were December to February. June ranked 11 of 12.
Is Guam humid in June? Mean relative humidity was 82%, with about 30 muggy days (dew point of 20°C or more) in the month.
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