Hollis, ME Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Hollis's primary NOAA station, HOLLIS.
The climate verdict for Hollis
Water is the standout signal in Hollis, Maine: 52.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 44°F. At 34/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 2% of scores.
- 44°F
- annual average temperature (NOAA normal)
- 34/100
- comfort score, above 2% of station-mapped location scores
- 52.1"
- annual precipitation · 81" snow
- 139 days
- growing season, frost-free days
Hollis: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00173862 · Hollis, ME 44°F mean · 52.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #1,029
- PHOTO-FINISH ≈ Howe
- PRCP-WET 52.1"
- SWING-WIDE 50°F
- COMF-LOW 34/100
- LOAD-HEAT 7,944 HDD
- STN-1 USC00173862
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Howe, ID (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every ME station list.
- Hollis (this station) 44°F
- Cold Carter, MT 44°F
- Hot Lincoln Nepp, NH 44°F
- Near Howe, ID 44°F
- Near Rumford, ME 44°F
Hollis sits in Maine, the #4 coldest U.S. state at 43.1°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Hollis
Hollis: 22/100 · grade F
Hollis publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Hollis, not an official NOAA rating. Rankings still use Comfort Score 34/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 52.1 in · 17.1 from 35 in | 39/100 · F |
| Normal heat + freeze calendar | 180 calendar days | 25/100 · F |
| Frost-free season | 139 days/year | 18/100 · F |
| Annual temperature balance | 44.0°F · 23.5° from 67.5°F | 16/100 · F |
| Snowfall burden | 80.9 inches/year | 6/100 · F |
Hollis · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Hollis is a continental Köppen climate: Dfb
Coldest-month mean 18.6°F and warmest-month mean 68.4°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 68.4°F
- Coldest month
- 18.6°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Hollis sits across the climate record
Three NOAA fields for Hollis's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 85%
- Among 6,861 stations, Hollis sits in the cooler third of annual means.
- Annual precipitation
- Top 15% wettest
- Hollis's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 80%
- Warmest-to-coldest month gap for Hollis is large versus 6,861 complete station-years.
How Hollis compares across U.S. station-mapped locations
Hollis's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
34 2nd percentile score exceeds 2% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 29°F (-1°C) | 8°F (-13°C) | 19°F (-7°C) | 3.6" | 19.8" | 30.5 | 0.0 |
| February | 33°F (0°C) | 9°F (-13°C) | 21°F (-6°C) | 3.6" | 20.4" | 27.8 | 0.0 |
| March | 41°F (5°C) | 19°F (-7°C) | 30°F (-1°C) | 4.6" | 15.4" | 29.0 | 0.0 |
| April | 54°F (12°C) | 30°F (-1°C) | 42°F (5°C) | 4.9" | 3.7" | 21.1 | 0.1 |
| May | 66°F (19°C) | 41°F (5°C) | 53°F (12°C) | 3.9" | 0.1" | 5.9 | 0.5 |
| June | 75°F (24°C) | 51°F (10°C) | 63°F (17°C) | 4.5" | 0.0" | 0.1 | 1.8 |
| July | 80°F (27°C) | 57°F (14°C) | 68°F (20°C) | 4.1" | 0.0" | 0.0 | 2.8 |
| August | 79°F (26°C) | 54°F (12°C) | 67°F (19°C) | 3.8" | 0.0" | 0.0 | 1.7 |
| September | 71°F (21°C) | 46°F (8°C) | 58°F (15°C) | 4.0" | 0.0" | 1.8 | 0.6 |
| October | 58°F (14°C) | 35°F (2°C) | 46°F (8°C) | 5.8" | 0.4" | 13.6 | 0.0 |
| November | 46°F (8°C) | 26°F (-3°C) | 36°F (2°C) | 4.5" | 3.4" | 24.4 | 0.0 |
| December | 35°F (2°C) | 16°F (-9°C) | 25°F (-4°C) | 4.9" | 17.7" | 30.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 18, short of 90°F on every date, while 180 dates carry a normal low at or below freezing, the coldest 6°F near January 28.
The freezing stretch
The normal low stays at or below 32°F into April 22, then returns to freezing around October 26, covering 180 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is June 5, when 45% of years recorded at least a hundredth of an inch. The driest is September 1 at 29%. Summed across the calendar, that is about 139 wet dates a year.
The widest day
May 10 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Hollis.
Where Hollis Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 180 nights a year, more than most ranked stations.
The normal water year runs well above the national norm at roughly 52 inches.
Hollis earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 19.8"
11.6 days with precipitation
Snow: 20.4"
9.8 days with precipitation
Snow: 15.4"
10.8 days with precipitation
Snow: 3.7"
11.8 days with precipitation
Snow: 0.1"
13.5 days with precipitation
13.8 days with precipitation
11.7 days with precipitation
10.3 days with precipitation
9.2 days with precipitation
Snow: 0.4"
11.8 days with precipitation
Snow: 3.4"
11.6 days with precipitation
Snow: 17.7"
12.1 days with precipitation
Hollis spreads its precipitation across the year
Neither half of the year dominates here: June through August take 24% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Hollis has no dry season to plan around, though it does carry a wide 49.8°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 5.8" and January 3.6". The three wettest months together take 30% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Hollis, it arrives in quantity
52.1" of precipitation falls across only about 138 wet days here, averaging 0.38 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 138 a year, 38% of all days
- Average depth per wet day
- 0.38 inches
- Most wet days
- June, about 14
- Fewest wet days
- September, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Hollis
Hollis averages 80.9 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 33 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 80.9 inches of depth.
- Days recording measurable snow: about 33 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 16% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 30
50% probability date
Last Spring Freeze
May 14
50% probability date
Growing Season
139 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,944
Higher = more heating needed
Cooling Degree Days
313
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside ME closest to Hollis on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (44°F here).
- Blair, WI 44°F · 0.0°F off
- Brockway, MT 44°F · 0.0°F off
- Dassel, MN 44°F · 0.0°F off
- De Smet, SD 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (52.1" here), excluding temperature-peer places.
- Coatesville, PA 52.1" · 0.0" off
- Commerce, GA 52.1" · 0.0" off
- Elkton, KY 52.1" · 0.0" off
- Marianna, AR 52.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define Hollis
heating led · wet · mid swing
Hollis's energy balance leans toward cold weather: 7,944 annual heating degree days against 313 for cooling. Its 49.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 139 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Hollis coldest normal
January
Averaging 19°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Hollis typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Hollis snow peak
February
Hollis averages 80.9 inches of snow a year, with February the snowiest month on the normals.
Questions about Hollis's climate
How much snow does Hollis get? ▼
How cold does Hollis get in winter? ▼
How much energy does heating and cooling require in Hollis? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hollis's primary station: HOLLIS (USC00173862). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Hollis; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Hollis comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.