[SMQ] Somerville [1999-]
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The following tables present IEM computed monthly data summaries based on daily data provided by or computed for the IEM. A download interface exists for the daily summary information. The climatology is provided by the nearest NCEI climate station (USW00054785) within the current 1991-2020 dataset.

To load shown data into Microsoft Excel, highlight the table information with your mouse and then copy/paste into Excel.

Precipitation Totals [inch]

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM0.614.5411.673.502.182.78
20000.732.163.202.603.612.873.978.883.621.082.852.43
20013.032.324.491.664.222.693.372.843.760.400.792.24
20022.510.593.943.285.623.891.003.694.305.124.223.83
20032.262.964.482.193.287.654.943.504.805.363.855.57
20041.672.843.155.404.392.3613.343.775.671.354.142.78
20053.742.694.424.381.133.762.780.932.5511.854.073.38
20064.921.430.603.603.459.146.272.404.005.965.192.87
20073.491.484.199.481.293.846.116.411.225.733.006.47
20083.806.215.382.373.962.364.590.826.552.913.305.38
20092.090.571.602.664.776.479.5511.914.1110.531.425.08
20102.603.219.392.643.062.845.702.163.725.452.322.87
20112.913.286.255.604.313.512.9112.568.392.653.833.90
20122.981.441.510.643.111.523.874.902.703.531.074.92
20131.402.232.012.433.939.770.064.422.770.802.803.42
20141.311.543.275.561.674.024.921.990.334.183.914.34
20153.180.613.681.902.235.621.751.482.323.661.814.20
20161.853.711.371.413.071.925.822.871.170.913.462.69
20173.401.552.601.882.793.615.544.630.995.031.151.49
20182.905.303.244.124.903.545.977.916.143.758.304.98
20193.713.053.684.238.124.805.624.640.714.721.675.12
20201.532.653.024.364.042.766.505.864.474.135.013.61
20211.954.463.352.404.473.615.317.108.835.051.011.67
20222.852.712.385.495.262.280.863.993.494.552.864.36
20234.281.242.855.660.823.834.095.436.542.083.178.03
20246.272.006.794.763.445.711.676.150.530.002.994.33
20250.572.864.293.177.413.425.560.82MMMM
NCEI Climatology3.162.293.893.593.544.234.935.183.823.673.413.87

Average Wind Speed [MPH]

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM4.14.34.53.75.04.8
20005.44.96.36.44.03.93.33.23.43.84.85.6
20013.85.46.54.74.43.43.52.53.44.14.24.3
20024.15.55.85.24.73.43.53.53.93.84.45.2
20036.05.44.86.13.42.62.91.93.23.14.04.7
20043.25.25.46.24.03.13.22.73.63.34.74.9
20054.94.85.75.34.53.33.13.13.44.84.64.3
20065.16.06.65.64.23.82.62.92.83.83.83.5
20073.95.54.56.23.93.73.02.72.63.23.84.5
20084.24.85.85.34.32.92.82.93.53.13.64.3
20093.85.24.75.03.12.32.31.73.03.34.65.3
20105.75.55.94.03.42.82.52.53.43.95.07.2
20115.66.97.06.55.14.62.82.62.03.12.83.2
20124.24.14.45.42.52.82.51.82.42.72.94.1
20133.65.36.55.13.43.12.41.82.52.95.13.4
20144.44.36.15.93.83.23.22.83.04.14.25.2
20155.65.65.25.73.63.42.62.83.14.03.73.3
20165.25.15.34.93.23.52.62.53.94.04.24.1
20174.34.96.54.94.03.02.32.53.23.33.73.7
20185.13.76.85.53.03.12.82.32.73.44.73.9
20195.45.04.94.93.32.92.02.02.43.54.13.6
20204.43.74.66.04.62.72.32.22.42.73.54.4
20215.24.55.45.04.02.72.52.43.03.03.23.0
20224.74.85.35.93.73.12.93.02.83.03.63.9
20233.74.45.94.53.23.22.22.83.32.63.23.2
20244.63.65.54.62.92.92.32.52.72.94.13.5
20255.24.85.55.43.92.32.12.6MMMM
NCEI ClimatologyMMMMMMMMMMMM

Average Daily High Temperature [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM90.5283.7175.6363.2356.4144.29
200036.0443.8355.9759.0371.4978.5780.0679.2373.3864.6151.2036.03
200137.7542.0045.6863.0072.6882.1581.8085.5476.0267.3460.6449.44
200245.3248.7552.9764.7369.8581.3687.8287.2279.1062.1651.2540.36
200332.6635.2752.3559.2565.9577.0684.9184.4475.4663.6557.1143.79
200430.6542.1751.1363.0776.5579.0482.2681.3977.3162.5855.6942.94
200536.6543.4446.0166.7969.6884.4087.0884.9082.3365.0157.8239.66
200647.0642.3752.1366.0173.4879.6487.3384.0173.7264.3458.9650.55
200743.4834.7952.5259.0077.1982.0083.9783.0380.4372.7751.6041.06
200841.7742.0151.7964.7369.8884.7387.3283.1977.9764.6750.7143.22
200933.5444.7751.0764.0672.1776.8682.4283.8574.8062.6858.0540.80
201038.6038.5457.1168.5975.4084.5189.4885.6380.1565.9754.5337.32
201133.5342.7349.3562.5474.1381.2389.5983.4576.1164.6759.3149.56
201243.1447.3659.8264.0874.9780.4288.5884.3976.3965.1950.7345.90
201340.4241.7747.1462.5072.7280.9187.2481.1176.3967.7153.9142.54
201433.3336.5744.9462.1473.4282.3384.4783.1578.8167.1450.9345.20
201535.9031.6845.2764.2079.1980.2786.4887.2083.4065.8759.9855.71
201640.8144.7959.2663.3071.5583.6088.8787.7481.6068.2658.3743.12
201742.6350.6447.3967.5370.0781.8785.5482.0374.3772.3355.1040.39
201838.6547.0746.0357.7775.8181.1786.6885.8477.3364.7149.4745.87
201938.3242.8949.5866.1772.9481.0789.2385.2380.7368.3950.7043.45
202045.7147.7256.6859.5771.0683.8389.5285.2977.6065.7161.0744.80
202140.5238.8255.4564.9073.0084.2086.2686.8178.7770.9054.5349.42
202237.3946.9654.9462.3375.1681.6791.5590.4878.1765.4557.7444.32
202348.8149.3952.6867.9373.5880.5088.2383.5278.0769.8154.4049.45
202441.6847.3156.5865.0075.0686.4090.0385.7478.0772.4859.6743.68
202536.5541.5059.0365.8072.8182.5089.2384.81MMMM
NCEI Climatology39.3042.9050.7063.1073.0081.3986.2084.3077.6965.9154.9044.10

Average Daily Low Temperature [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM64.9062.0356.0338.9036.7427.10
200021.2825.0032.3239.8749.6357.5360.1361.9753.0742.0931.8019.27
200116.4625.3528.7739.3548.7758.4958.1362.5750.1639.7133.3428.08
200224.1423.3830.5339.8445.2156.9462.6862.6954.2442.6031.4222.82
200317.9817.0728.6437.8447.5356.4762.8064.5656.9639.9237.9825.97
200416.6821.9332.9442.0054.3557.3062.5462.1156.4942.8234.7225.25
200519.6522.4825.5038.5743.6660.2764.9759.5555.4046.2532.8820.48
200626.9022.0330.0239.0748.1960.0364.4362.4352.8440.7939.1729.35
200725.8717.6128.1937.9047.4257.6361.1661.5553.1049.1330.9726.77
200822.2924.0429.9240.1943.5358.6563.4657.1655.4737.9332.6424.85
200915.0822.4428.5238.9747.9357.3158.9463.7152.9841.6237.5524.51
201020.5922.5834.4239.6250.5859.4164.0561.6154.0440.9231.4720.93
201113.5119.6429.4542.1052.3258.5164.9862.4559.1544.0835.3128.04
201224.3825.8537.5638.9854.9457.5565.1062.3454.4246.5527.9330.77
201323.6025.3829.7839.9447.6859.4767.8560.9550.6543.7331.8323.43
201413.2615.3424.4937.6650.2458.3862.9958.4553.9945.0830.1631.89
201518.658.9924.4537.8351.1359.8063.5660.3856.1740.1337.3337.48
201619.5823.6633.0336.9348.0656.5364.5264.7055.8042.8732.3025.03
201727.4826.7127.8744.5349.2756.8764.4060.2654.0047.1330.2022.52
201816.7127.5729.3735.2053.1357.0363.4565.8461.3744.8732.6328.65
201921.3224.8927.2942.8350.8456.6065.7462.7754.8345.6828.5726.35
202025.6128.4134.9737.0047.7157.2066.4264.1053.4044.6133.0324.80
202123.4222.6431.2338.8046.3558.8064.2965.4855.7749.5228.8330.19
202217.1021.1131.3238.5051.7455.9364.2363.6553.7740.4832.9024.52
202331.3224.6430.2941.4042.7754.1365.4561.4556.7045.5528.6032.00
202426.7125.2435.7441.0052.8158.4366.5262.1354.9340.3234.7323.29
202517.2623.2531.2940.5750.8760.9766.6858.73MMMM
NCEI Climatology20.6022.4029.5038.9048.2157.6063.0161.2953.8142.0932.8926.20

Average Daily Temperature (high+low)/2 [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM77.7172.8765.8351.0646.5735.69
200028.6634.4244.1549.4560.5668.0570.1070.6063.2253.3541.5027.65
200127.1033.6837.2351.1760.7370.3269.9674.0563.0953.5246.9938.76
200234.7336.0641.7552.2857.5369.1575.2574.9566.6752.3841.3331.59
200325.3226.1740.5048.5556.7466.7673.8574.5066.2151.7847.5534.88
200423.6632.0542.0352.5365.4568.1772.4071.7566.9052.7045.2034.10
200528.1532.9635.7552.6856.6772.3476.0372.2368.8755.6345.3530.07
200636.9832.2041.0752.5460.8369.8475.8873.2263.2852.5749.0639.95
200734.6826.2040.3548.4562.3169.8272.5672.2966.7760.9541.2833.92
200832.0333.0340.8652.4656.7071.6975.3970.1866.7251.3041.6834.04
200924.3133.6139.7951.5260.0567.0970.6873.7863.8952.1547.8032.65
201029.5930.5645.7654.1162.9971.9676.7773.6267.0953.4443.0029.12
201123.5231.1839.4052.3263.2269.8777.2972.9567.6354.3847.3138.80
201233.7636.6148.6951.5364.9568.9876.8473.3765.4155.8739.3338.33
201332.0133.5838.4651.2260.2070.1977.5471.0363.5255.7242.8732.98
201423.3025.9534.7149.9061.8370.3573.7370.8066.4056.1140.5438.55
201527.2720.3434.8651.0165.1670.0475.0273.7969.7853.0048.6546.60
201630.1934.2246.1550.1259.8170.0776.6976.2268.7055.5645.3334.07
201735.0638.6837.6356.0359.6769.3774.9771.1564.1859.7342.6531.45
201827.6837.3237.7046.4864.4769.1075.0775.8469.3554.7941.0537.26
201929.8233.8938.4454.5061.8968.8377.4874.0067.7857.0339.6334.90
202035.6638.0745.8248.2859.3970.5277.9774.6965.5055.1647.0534.80
202131.9730.7343.3451.8559.6871.5075.2776.1567.2760.2141.6839.81
202227.2434.0443.1350.4263.4568.8077.8977.0665.9752.9745.3234.42
202340.0637.0241.4854.6758.1867.3276.8472.4867.3857.6841.5040.73
202434.1936.2846.1653.0063.9472.4278.2773.9466.5056.4047.2033.48
202526.9032.3845.1653.1861.8471.7377.9571.77MMMM
NCEI Climatology29.9532.6540.1051.0060.6069.5074.6172.8065.7554.0043.8935.15

Average Relative Humidity [%]

This value is computed via a simple average of available observations weighted by the duration between observations.

YearJanFebMarAprMayJunJulAugSepOctNovDec
1999MMMMMM64.8%69.5%78.8%78.5%73.5%69.5%
200069.3%69.5%65.7%69.5%77.1%80.1%76.1%79.8%81.5%75.8%70.2%65.6%
200176.5%68.4%68.1%65.0%69.0%74.8%72.6%78.0%77.0%68.4%69.3%68.4%
200268.6%59.6%63.9%65.0%66.9%74.2%71.0%69.6%76.2%79.5%76.7%70.6%
200364.4%65.9%69.4%65.2%76.7%80.7%76.5%82.2%80.9%75.4%73.5%67.5%
200458.7%59.5%67.0%64.7%73.8%72.0%76.4%78.8%79.0%75.5%66.8%67.5%
200569.0%64.4%63.0%58.7%62.3%73.7%73.7%69.8%67.3%76.7%68.0%68.7%
200672.1%59.0%51.2%57.1%64.3%74.4%75.8%72.6%77.8%70.6%72.0%66.0%
200765.3%55.3%57.0%61.3%61.2%69.5%71.5%76.3%74.1%76.8%69.8%74.0%
200864.8%70.8%59.6%61.8%68.6%71.7%73.0%71.7%75.1%71.9%72.4%71.7%
200963.5%59.4%60.9%60.4%71.9%80.0%74.4%79.2%76.2%77.1%71.4%65.2%
201063.2%66.0%64.2%61.4%69.4%72.0%72.2%74.5%72.5%74.6%71.1%65.8%
201170.5%63.5%62.2%69.0%72.2%72.0%69.1%76.8%83.9%72.6%72.4%70.1%
201263.1%62.3%63.0%52.8%75.3%69.5%69.5%76.7%77.0%79.6%71.4%77.3%
201367.1%66.7%60.8%58.3%72.8%75.7%76.9%78.8%75.3%74.0%64.2%74.4%
201466.8%68.1%55.3%59.8%66.4%68.7%71.4%70.0%72.7%71.3%64.3%69.2%
201562.0%59.4%60.2%55.7%63.4%73.1%71.0%67.1%69.5%69.3%68.5%76.9%
201662.0%64.7%57.9%56.6%70.5%64.3%72.4%74.1%69.9%70.9%65.9%66.2%
201770.2%61.9%57.5%65.0%71.1%72.5%78.1%79.8%82.2%78.7%73.6%69.7%
201868.6%78.2%64.7%65.2%77.3%76.0%78.9%83.7%84.6%79.3%71.4%74.4%
201963.5%64.6%59.6%63.6%75.3%71.9%75.2%76.3%74.0%74.9%66.2%76.3%
202066.6%65.8%62.8%61.5%63.1%70.9%76.1%79.0%77.1%80.3%72.1%70.3%
202165.4%67.6%57.3%59.6%64.6%73.8%77.0%79.4%80.4%83.1%73.8%73.6%
202266.4%66.1%62.3%60.1%71.5%71.5%66.7%67.4%75.7%77.7%70.8%71.6%
202374.1%64.8%62.4%64.7%63.2%71.8%78.0%76.9%81.0%80.3%70.6%77.6%
202472.2%67.6%64.1%66.7%76.7%70.4%76.6%79.8%78.8%68.5%67.2%73.8%
202562.6%65.4%62.0%62.8%77.4%80.7%81.6%77.9%MMMM

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