Precipitation normals are calculated by taking the mean (average) of the precipitation in each month, over a thirty-year period. Sixty-one locations reported on this aspect of Maine’s climate for the period 1971 through 2010. Data reflects the average in the number of days with a minimum of .01 inches of precipitation for a location.
See also Temperature Normals.
| LOCATION | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN |
| Acadia Park |
5.94 | 4.52 | 5.46 | 4.93 | 4.53 | 4.10 | 3.38 | 2.93 | 4.42 | 4.86 | 6.42 | 5.81 | 57.30 |
| Albion | 4.09 | 2.86 | 4.57 | 3.48 | 3.72 | 4.34 | 2.88 | 2.71 | 3.96 | 3.74 | 4.49 | 3.95 | 44.79 |
| Allagash | 2.79 | 1.95 | 2.10 | 2.52 | 2.99 | 3.56 | 3.93 | 3.67 | 3.35 | 3.25 | 3.16 | 2.65 | 35.92 |
| Augusta AP | 3.26 | 2.55 | 3.64 | 3.78 | 3.90 | 3.58 | 3.43 | 3.25 | 3.6 | 4.04 | 3.81 | 3.50 | 42.34 |
| Bangor INTL AP | 3.34 | 2.54 | 3.44 | 3.32 | 3.40 | 3.41 | 3.24 | 2.99 | 3.39 | 3.48 | 3.69 | 3.33 | 39.57 |
| Barnard | 3.86 | 2.68 | 3.61 | 3.63 | 4.33 | 4.06 | 3.59 | 3.81 | 3.87 | 3.82 | 4.05 | 3.49 | 44.80 |
| Belfast | 4.06 | 3.01 | 4.38 | 4.45 | 4.18 | 3.88 | 3.20 | 3.01 | 4.10 | 4.33 | 4.74 | 4.31 | 47.65 |
| BinghamWyman Dam | 3.16 | 2.12 | 3.35 | 3.46 | 4.04 | 4.54 | 4.00 | 3.84 | 3.89 | 3.82 | 3.85 | 3.31 | 43.38 |
| Blanchard | 4.03 | 2.65 | 3.96 | 4.27 | 4.42 | 4.35 | 3.29 | 3.48 | 4.22 | 4.43 | 4.70 | 3.58 | 47.38 |
| Brassua Dam | 3.02 | 2.23 | 2.91 | 3.41 | 3.80 | 4.10 | 4.19 | 3.78 | 3.86 | 3.56 | 3.48 | 3.05 | 41.39 |
| Bridgewater | 3.62 | 2.50 | 3.08 | 3.33 | 3.78 | 3.62 | 3.74 | 3.85 | 3.59 | 3.46 | 3.83 | 3.49 | 41.89 |
| Bridgton 3 NW | 4.25 | 3.36 | 4.18 | 3.99 | 3.77 | 4.05 | 4.03 | 3.97 | 3.66 | 4.61 | 4.25 | 3.81 | 47.93 |
| Brunswick | 4.06 | 3.57 | 4.55 | 4.47 | 4.11 | 3.57 | 3.31 | 3.15 | 3.71 | 4.19 | 4.87 | 4.47 | 48.03 |
| Caribou AP | 2.97 | 2.06 | 2.57 | 2.64 | 3.27 | 3.31 | 3.89 | 4.15 | 3.27 | 2.99 | 3.12 | 3.19 | 37.44 |
| Clayton Lake | 2.78 | 2.12 | 2.16 | 2.62 | 2.92 | 3.86 | 3.86 | 3.16 | 3.43 | 3.35 | 2.85 | 2.42 | 35.53 |
| Corinna | 3.45 | 2.52 | 3.64 | 3.72 | 3.72 | 3.83 | 3.44 | 3.61 | 3.82 | 3.82 | 3.80 | 3.45 | 42.82 |
| Danforth | 3.79 | 2.69 | 3.88 | 3.32 | 3.89 | 3.45 | 3.27 | 2.99 | 3.59 | 3.54 | 3.79 | 3.56 | 41.76 |
| Dover-Foxcroft | 3.85 | 2.78 | 3.48 | 3.65 | 3.80 | 3.98 | 3.55 | 3.57 | 4.08 | 3.82 | 3.85 | 3.62 | 44.03 |
| East Hiram |
3.96 | 3.15 | 4.26 | 4.42 | 3.99 | 3.89 | 4.12 | 3.63 | 3.68 | 4.58 | 4.58 | 4.10 | 48.36 |
| Eastport | 4.31 | 3.24 | 4.03 | 3.60 | 3.77 | 3.35 | 3.06 | 2.98 | 3.81 | 4.00 | 4.24 | 4.43 | 44.82 |
| Ellsworth | 4.27 | 3.14 | 4.22 | 4.20 | 3.85 | 3.66 | 3.46 | 2.94 | 4.05 | 4.20 | 4.70 | 4.11 | 46.80 |
| Eustis | 2.66 | 2.45 | 2.82 | 3.16 | 3.40 | 4.05 | 3.68 | 3.50 | 3.61 | 3.20 | 3.33 | 2.78 | 38.64 |
| Farmington | 3.73 | 2.81 | 4.03 | 4.10 | 3.97 | 4.50 | 3.65 | 3.94 | 3.73 | 4.06 | 4.20 | 3.94 | 46.66 |
| Fort Kent |
2.78 | 1.85 | 2.25 | 2.72 | 3.29 | 3.54 | 3.91 | 4.16 | 3.39 | 3.08 | 2.89 | 2.93 | 36.79 |
| Gardiner | 3.70 | 2.73 | 4.02 | 4.04 | 3.81 | 3.74 | 3.28 | 3.25 | 3.61 | 3.92 | 4.19 | 3.68 | 43.97 |
| Grand Lake Stream |
4.28 | 3.14 | 4.11 | 3.77 | 3.51 | 3.39 | 3.37 | 3.10 | 3.82 | 3.73 | 4.38 | 4.18 | 44.78 |
| Guilford | 3.91 | 2.66 | 3.74 | 3.71 | 3.93 | 4.23 | 3.33 | 3.44 | 3.98 | 4.09 | 4.03 | 3.60 | 44.65 |
| Harmony | 3.39 | 2.30 | 3.49 | 3.54 | 3.80 | 4.16 | 3.25 | 3.32 | 3.75 | 3.73 | 3.84 | 3.15 | 41.72 |
| Harris Station |
2.39 | 1.67 | 2.28 | 2.86 | 3.50 | 3.96 | 3.82 | 3.56 | 3.52 | 3.16 | 2.99 | 2.44 | 36.15 |
| Houlton AP | 3.28 | 2.12 | 2.71 | 2.84 | 3.23 | 3.66 | 3.46 | 3.69 | 3.44 | 3.31 | 3.62 | 3.27 | 38.63 |
| Houlton 5 N | 3.79 | 2.46 | 2.98 | 3.19 | 3.61 | 3.81 | 3.46 | 4.08 | 3.44 | 3.45 | 3.50 | 3.57 | 41.34 |
| Jackman | 2.84 | 2.10 | 2.58 | 3.06 | 3.35 | 3.97 | 4.19 | 3.81 | 3.77 | 3.29 | 3.37 | 2.97 | 39.30 |
| Jonesboro | 5.10 | 3.65 | 4.63 | 4.56 | 4.54 | 3.73 | 3.64 | 3.13 | 4.06 | 4.32 | 5.05 | 4.89 | 51.30 |
| Kennebunkport | 3.94 | 3.41 | 4.26 | 4.33 | 4.32 | 3.38 | 3.01 | 3.02 | 3.65 | 4.77 | 4.63 | 4.35 | 47.07 |
| Kingfield | 3.65 | 2.61 | 3.69 | 3.98 | 3.94 | 4.63 | 3.77 | 3.93 | 3.46 | 3.91 | 4.25 | 3.56 | 45.38 |
| Lewiston | 3.90 | 3.00 | 4.52 | 4.11 | 3.80 | 3.82 | 3.63 | 3.06 | 3.48 | 4.08 | 4.27 | 4.12 | 45.79 |
| Long Falls Dam |
3.09 | 2.16 | 3.28 | 3.42 | 3.46 | 3.77 | 3.73 | 3.40 | 3.41 | 3.40 | 3.68 | 3.04 | 39.84 |
| Lovell | 3.85 | 2.90 | 3.95 | 3.86 | 3.88 | 3.70 | 3.34 | 4.68 | 3.23 | 3.95 | 3.91 | 3.45 | 44.70 |
| Machias | 4.97 | 3.50 | 4.63 | 4.36 | 4.47 | 3.58 | 3.51 | 3.02 | 4.23 | 4.21 | 5.11 | 4.98 | 50.57 |
| Madison | 3.23 | 2.32 | 3.20 | 3.31 | 3.64 | 3.63 | 3.28 | 3.25 | 3.26 | 3.50 | 3.61 | 3.36 | 39.59 |
| Middle Dam |
2.67 | 1.94 | 2.74 | 2.80 | 3.42 | 3.87 | 3.71 | 3.91 | 3.44 | 3.48 | 3.22 | 2.55 | 37.75 |
| Millinocket | 3.37 | 2.39 | 3.08 | 3.54 | 3.78 | 3.94 | 3.80 | 3.95 | 3.67 | 3.70 | 3.67 | 3.45 | 42.34 |
| Moosehead | 2.97 | 2.15 | 2.96 | 3.22 | 3.38 | 4.12 | 4.01 | 3.81 | 3.68 | 3.43 | 3.33 | 3.04 | 40.10 |
| Newcastle | 4.35 | 3.22 | 4.42 | 4.24 | 4.00 | 3.58 | 3.11 | 2.75 | 3.83 | 4.10 | 4.70 | 4.63 | 46.93 |
| Orono | 3.52 | 2.37 | 3.26 | 3.21 | 3.34 | 3.56 | 3.37 | 3.24 | 3.84 | 3.40 | 3.53 | 3.63 | 40.27 |
| Phillips | 3.54 | 2.68 | 3.33 | 3.52 | 4.02 | 4.70 | 3.25 | 3.48 | 3.81 | 3.86 | 4.20 | 3.23 | 43.62 |
| Port Clyde |
4.91 | 3.42 | 4.71 | 4.36 | 3.59 | 2.63 | 2.71 | 2.29 | 3.81 | 3.60 | 4.65 | 4.02 | 44.70 |
| Portland AP | 4.09 | 3.14 | 4.14 | 4.26 | 3.82 | 3.28 | 3.32 | 3.05 | 3.37 | 4.40 | 4.72 | 4.24 | 45.83 |
| Presque Isle |
2.55 | 1.68 | 2.12 | 2.35 | 3.44 | 3.43 | 3.71 | 3.94 | 3.44 | 3.28 | 2.77 | 2.56 | 35.27 |
| Rangeley | 3.23 | 2.17 | 3.15 | 3.18 | 3.40 | 4.07 | 3.88 | 3.99 | 3.64 | 3.46 | 3.44 | 3.00 | 40.61 |
| Ripogenus Dam | 2.85 | 1.94 | 2.87 | 3.21 | 3.54 | 3.98 | 4.11 | 3.90 | 3.67 | 3.31 | 3.39 | 2.96 | 39.73 |
| Rumford 1SSE | 3.39 | 2.31 | 3.71 | 3.82 | 3.94 | 4.38 | 3.88 | 4.25 | 3.64 | 3.98 | 4.24 | 3.37 | 44.91 |
| Sanford 2NNW | 4.16 | 3.51 | 4.51 | 4.50 | 3.92 | 3.53 | 3.91 | 3.63 | 3.75 | 4.27 | 4.82 | 4.28 | 48.79 |
| Squa Pan Dam | 2.91 | 2.13 | 2.46 | 2.68 | 3.45 | 3.40 | 3.53 | 3.86 | 3.33 | 3.15 | 2.97 | 3.13 | 37.00 |
| Van Buren 2 | 2.75 | 1.97 | 2.28 | 2.65 | 3.39 | 3.51 | 4.36 | 3.84 | 3.36 | 3.25 | 3.14 | 3.05 | 37.55 |
| Vanceboro 2 | 3.68 | 2.50 | 3.16 | 3.47 | 4.08 | 3.81 | 3.94 | 3.64 | 4.07 | 3.92 | 4.31 | 3.54 | 44.12 |
| Waterville Treatment | 3.33 | 2.41 | 3.63 | 3.39 | 3.70 | 3.76 | 3.59 | 3.37 | 3.78 | 3.90 | 3.59 | 3.19 | 41.64 |
| W Buxton 2NNW | 3.73 | 3.01 | 4.31 | 4.45 | 3.91 | 3.60 | 3.82 | 3.21 | 3.72 | 4.32 | 4.49 | 3.95 | 46.52 |
| W Paris |
3.56 | 2.50 | 3.34 | 3.64 | 3.38 | 3.90 | 3.29 | 3.85 | 3.18 | 3.89 | 3.74 | 3.21 | 41.48 |
| W Rockport 1NNW | 4.76 | 3.43 | 4.73 | 4.74 | 4.38 | 3.80 | 3.19 | 2.90 | 4.31 | 4.79 | 5.25 | 4.98 | 51.26 |
| Woodland | 4.11 | 3.25 | 3.90 | 3.76 | 3.78 | 3.57 | 3.27 | 3.09 | 3.71 | 4.07 | 4.50 | 4.22 | 45.23 |
Additional resources
Data from http://www.erh.noaa.gov/er/gyx/climo/ME_STATS_NEW.htm; calculation notes from http://www.erh.noaa.gov/er/gyx/climate_f6.shtml (accessed 12/15/2010)