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Weather on May 21 at Haleakala

Haleakala National Park

HIIslands & Territories7,000 ft elevation
Avg High85°F
Avg Low68°F
Warmest199682°F
Coldest198570°F

Based on 56 years of data from Kahului, HI

Elevation Note: Haleakala sits at 7,000 ft. Expect temperatures 25°F cooler than the data shown below, which comes from Kahului, HI at a lower elevation.

Planning Your Visit

May 21st in Haleakala National Park (via Kahului, HI) typically brings warm spring weather, with average highs around 85°F and lows near 68°F. Over 56 years of records, the warmest May 21st was in 1996 (82°F average), while the coldest was 1985 (70°F) — a 12°F range across recorded history. Rain or other precipitation has occurred on about 18% of May 21st dates historically, with the wettest May 21st recording 1.85" of rain. Temperatures on this date have remained relatively stable over the past several decades.

Temperatures on this date have remained relatively stable over the past several decades.

Planning for May 21st in Haleakala? Stay hydrated and seek shade during peak afternoon hours.

Year by Year History

YearHighLowPrecipSnow
202683°F71°F0"--
202586°F71°F0"--
202486°F66°F0"--
202388°F69°F0"--
202289°F70°F0"--
202182°F65°F0"--
202089°F74°F0"--
201992°F70°F0"--
201882°F70°F0"--
201785°F64°F0"--
201686°F71°F0.05"--
201584°F62°F0"--
201484°F64°F0"--
201385°F65°F0"--
201287°F63°F0"--
201185°F71°F0.03"--
201083°F69°F0"--
200982°F68°F0"--
200888°F65°F0"--
200789°F67°F0"--
200681°F67°F0.05"--
200585°F70°F0.03"--
200489°F70°F0"--
200385°F63°F0"--
200286°F65°F0"--
200184°F64°F0"--
200088°F70°F0"--
199987°F65°F0"--
199883°F70°F0"--
199785°F63°F0"0"
199692°F72°F0"0"
199586°F62°F0"0"
199484°F68°F0"0"
199381°F70°F0"0"
199288°F72°F0"0"
199186°F67°F0.03"0"
199083°F70°F0"0"
198985°F67°F0"0"
198885°F70°F0.03"0"
198780°F69°F0.03"0"
198685°F65°F0"0"
198576°F65°F0"0"
198486°F74°F0"0"
198373°F68°F1.85"0"
198284°F70°F0.03"0"
198188°F65°F0"0"
198087°F72°F0"0"
197983°F67°F0"0"
197889°F71°F0.56"0"
197782°F70°F0"0"
197679°F68°F0"0"
197578°F68°F0"0"
197481°F71°F0"0"
197378°F66°F--0"
197286°F63°F0"0"
197181°F70°F0"0"

May 21 at Nearby Parks

Holiday Weather at Haleakala

Official NPS WebsiteVisit nps.gov/hale for park information, alerts, and reservations

Explore More at Haleakala

See historical weather for other dates

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