What is the hottest month at Lassen Volcanic?

July, with an average high of 79°F and an average low of 46°F at Manzanita Lake (NOAA 1991–2020 normals). The station averages 4 days a year at or above 90°F.

How cold does Lassen Volcanic get in winter?

February is the coldest month, averaging a low of 22°F and a high of 42°F at Manzanita Lake. About 196 nights a year drop to freezing or below.

Does it snow at Lassen Volcanic?

Manzanita Lake records almost no snowfall (no snow normals). Higher elevations in the park can differ.

When is the rainy season at Lassen Volcanic?

January is the wettest month on average (6.5 inches of precipitation at Manzanita Lake); the station's annual total is 42.1 inches.

How many hours of daylight does Lassen Volcanic get?

About 15h 03m on June 15 and 9h 18m on December 15 (sunrise 5:35 AM, sunset 8:38 PM in June; 7:22 AM to 4:40 PM in December, America/Los Angeles time).

What is the best month to visit Lassen Volcanic for weather?

By NOAA's normals, average highs sit between 55°F and 85°F in May, June, July, August, September and October. Of those, May, August, September and October are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Manzanita Lake station.

Weather by month

Lassen Volcanic weather, month by month

Last verified October 6, 2026NOAA 1991–2020 normalsAmerica/Los Angeles time

Average highs, lows, rain, snow and daylight for every month. Measured at the Manzanita Lake (5,750 ft, 0.8 mi from Loomis Museum).

A frozen lake below snow-covered trees and peak — Photo: NPS Photo / Scott Arnaz

Jul high: 79°F; hottest month
Feb low: 22°F; coldest month
Rain + snowmelt: 42.1in / yr; wettest: Jan
Snowfall: —in / yr; rare
Days ≥ 90°F: 4/ yr
Nights ≤ 32°F: 196/ yr

Manzanita Lake

Month by month

Normals are 30-year averages (1991–2020). Crowds = each month’s share of the park’s busiest month, from NPS visitor counts. Sunrise and sunset are for the 15th of each month in 2027.

Average high and low, every monthbars run from the low to the high · tan strip = precipitation

Month	High	Low	Rain	Wet days	Sunrise	Sunset	Daylight	Crowds
Jan	41°	22°	6.5″	—	7:27 AM	5:03 PM	9h 36m	8
Feb	42°	22°	5.5″	—	6:59 AM	5:40 PM	10h 41m	7
Mar	46°	24°	6.4″	—	7:17 AM	7:12 PM	11h 54m	6
Apr	50°	28°	4.3″	—	6:27 AM	7:44 PM	13h 17m	11
May	61°	35°	2.9″	—	5:49 AM	8:15 PM	14h 26m	31
Jun	70°	41°	1.3″	—	5:35 AM	8:38 PM	15h 03m	72
Jul	79°	46°	0.3″	—	5:48 AM	8:35 PM	14h 47m	100
Aug	78°	45°	0.3″	—	6:16 AM	8:04 PM	13h 48m	56
Sep	72°	41°	0.7″	—	6:46 AM	7:16 PM	12h 29m	47
Oct	59°	33°	2.7″	—	7:16 AM	6:26 PM	11h 10m	35
Nov	47°	26°	4.7″	—	6:52 AM	4:49 PM	9h 57m	9
Dec	40°	22°	6.5″	—	7:22 AM	4:40 PM	9h 18m	6

Sweet spot: May, August, September and October combine average highs between 55°F and 85°F with crowds under 60% of the peak month. Check what is open in those months — quiet can also mean closed roads.

How to read this

These are NOAA’s official 1991–2020 climate normals for one weather station, not a model of the whole park. The station is the one with complete temperature and precipitation normals nearest to a visitor center. Highs and lows are daily averages for the month; “wet days” are days with at least 0.01 inch of precipitation. Mountain parks can be 10–20 °F cooler at their high points than at the station, and the NPS weather page for Lassen Volcanic is the place for current conditions and seasonal closures.

Sunrise and sunset are computed with the NOAA solar equations for the park’s coordinates and shown in America/Los Angeles time for the 15th of each month of 2027; they are accurate to about a minute.

Sources · 3

1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
2.Lassen Volcanic National Park — Weather (nps.gov) · National Park Service
3.Lassen Volcanic National Park — Visitor Use Statistics · National Park Service (IRMA)

FAQ

Lassen Volcanic weather questions

What is the hottest month at Lassen Volcanic?: July, with an average high of 79°F and an average low of 46°F at Manzanita Lake (NOAA 1991–2020 normals). The station averages 4 days a year at or above 90°F.
How cold does Lassen Volcanic get in winter?: February is the coldest month, averaging a low of 22°F and a high of 42°F at Manzanita Lake. About 196 nights a year drop to freezing or below.
Does it snow at Lassen Volcanic?: Manzanita Lake records almost no snowfall (no snow normals). Higher elevations in the park can differ.
When is the rainy season at Lassen Volcanic?: January is the wettest month on average (6.5 inches of precipitation at Manzanita Lake); the station's annual total is 42.1 inches.
How many hours of daylight does Lassen Volcanic get?: About 15h 03m on June 15 and 9h 18m on December 15 (sunrise 5:35 AM, sunset 8:38 PM in June; 7:22 AM to 4:40 PM in December, America/Los Angeles time).
What is the best month to visit Lassen Volcanic for weather?: By NOAA's normals, average highs sit between 55°F and 85°F in May, June, July, August, September and October. Of those, May, August, September and October are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Manzanita Lake station.

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