A Maui family plan can put a beach afternoon in Kīhei and Haleakalā’s summit on consecutive days, and the weather app shows one island for both. The National Park Service says the 3,055-metre summit runs about 17°C colder than the coast. On a single day, the park can range from 27°C at Kīpahulu to −1°C at the top.
The fix is not a jacket bought on the way up. The park sells no food, clothing or fuel. It is the summit forecast, read the night before, and a packing list written for the top.
The signal: one park, two climates
On 22 October 2026 we opened Haleakalā National Park’s weather, sunrise, hiking, summit, fees and conditions pages. The weather page says temperature drops about 5°C for every 1,000 metres of climb. Year-round, the summit ranges from below freezing to highs of 10 to 18°C, and wind chill and damp cloud make it feel colder. It adds that the weather can differ a lot from the forecast.
Sunrise is the coldest version of the day. The park says the hours just before dawn and just after dusk are regularly wet, windy and below freezing. Entry from 3 am to 7 am needs a US$1 reservation per vehicle, booked on recreation.gov up to 60 days ahead, plus the entrance fee. Reservations are not refunded or exchanged because of weather.
The height affects people as well as the temperature. The hiking page lists nausea, headache, dizziness and shortness of breath as signs of altitude sickness. It asks pregnant travellers and anyone with heart or respiratory conditions to consult a doctor before visiting the summit area, and it calls hypothermia a danger.
The summit is also far from help and supplies. The park says emergency medical help is at least an hour away, there is no fuel in the park, and there are no electric-vehicle chargers. It says even fully charged electric vehicles have failed to reach the summit. From Wailea, it gives the drive to the summit as about 3 hours.
What breaks when the summit day is planned from the hotel forecast
The bag is packed for the beach: shorts and sandals suit Kīhei and fail at 3,000 metres. The park’s stargazing page asks for layers, a hat, a coat, long pants and warm shoes.
The hour is chosen for the photo: sunrise is when the top is coldest and wettest, and the reservation won’t move if the morning is grey. With a 3-hour drive, it also means leaving in the middle of the night.
Nobody asked who is going: a traveller who is pregnant, or has a heart or lung condition, needs a doctor’s view before the day goes on the plan, not at the gate.
The car can’t get there: a hire car chosen without the fuel and charging note can leave you short of the summit.
No second day: if the summit forecast turns, a plan with fixed bookings on every other day leaves nowhere to move it.
Four checks before a summit day goes on the plan
Plan the high day by the top
Find the forecast for the top: the park’s weather page links a zone forecast for the summit district from about 2,100 metres up, a point forecast for the summit and a summit webcam. Use those, not the forecast for your hotel.
Pack for the top: layers, jackets, hats, long pants, closed shoes, rain gear and sun protection for every traveller, plus food and water. The park says drinking water is available at its visitor centres.
Check who is going: read the altitude advice against your party before you book anything for that day.
Pick the hour, then keep a spare day: decide between sunrise and daylight knowing sunrise is the coldest, and put a flexible day next to the summit in case the forecast turns.
The four checks are our recommendation, built from the park’s pages above. They aren’t a checklist the National Park Service publishes. Forecasts, conditions and reservation rules change, so reopen the official pages before you go.
Where Alfred fits
Alfred plans from a travelling profile, so the ages it plans for come from the travellers on that profile. On web Lets Go, Holiday and Multi-city both take a day pace: Slow fills only an afternoon slot, Moderate a morning and an afternoon, and Active adds an optional evening.
While a web trip is Planning, Alfred’s TripTrust destination preview fills in sections that include Weather. It is a destination brief for context and doesn’t change the itinerary. Alfred doesn’t check the summit forecast, park reservations or fuel while it writes the day.
When the itinerary is ACTIVE, you can edit an item’s title, times and notes, so “Haleakalā: check the summit forecast at 7 pm; jackets for all four; fuel in Pukalani” can sit on the card. In Hey Alfred, you can ask to swap two full days, and you confirm before it is applied.
A day with a flight can’t be swapped that way. Our Maui from Kīhei itinerary pairs the summit day with an aquarium day like this. Book opens a partner checkout. It doesn’t know the temperature at the top.
Practical next step
Find the highest day on your plan. On its card, write where the summit forecast is posted, what each person wears at the top, and when you will decide. If the forecast for the top looks wet and windy, move the day, not the packing list.
Plan your trip with Alfred
Start with your people, dates and pace, then review the editable plan before booking.
Plan your trip with Alfred