Boulder Monthly Climate Data: Precipitation

Values are monthly totals and units are in inches.

Note: precipitation includes rain, snow, hail... Snow/ice amounts are either directly measured or a ratio of 1/10 applied for inches of snow to water equivalent.

.
YearJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR TOTAL
18930.050.700.251.002.000.500.600.750.601.160.800.39 8.80**
18940.160.821.402.304.500.803.080.842.100.100.300.6717.07
18950.300.661.981.894.283.774.310.820.501.270.440.1320.35
18960.380.501.740.845.601.691.531.931.670.590.000.2016.67
18970.230.802.400.942.303.713.092.960.861.660.470.7020.12
18980.430.550.671.543.761.510.971.521.120.901.761.3016.03
18990.870.982.791.230.550.582.181.810.151.94 Tr 0.9614.04
19000.401.060.759.181.840.490.480.221.540.130.190.6116.89
19010.530.301.743.511.621.760.461.690.160.65Tr 1.4313.85
19020.370.481.481.012.321.461.260.535.461.441.291.3418.44
19030.081.521.452.312.021.870.951.461.313.430.150.1616.71
19040.090.312.371.455.352.721.051.001.601.060.080.7017.78
19050.810.701.856.654.780.551.860.221.642.540.23Tr21.83
19060.220.172.455.323.371.563.812.503.131.801.87Tr26.20
19070.220.560.473.595.290.592.790.441.060.580.410.2716.27
19080.600.090.230.713.450.292.073.301.552.591.961.0417.88
19090.111.213.963.601.851.673.182.424.510.551.561.7226.34
19100.201.390.051.343.380.481.582.690.481.050.270.5313.44
19110.731.560.642.680.901.301.691.240.261.590.720.2013.51
19120.581.322.001.712.821.913.331.772.701.030.930.4620.56
19130.491.280.711.581.850.484.040.542.622.240.004.2020.03
19140.000.081.773.383.571.702.321.970.252.690.310.2918.33
19150.391.311.684.463.831.782.581.673.021.830.251.5024.30
19160.690.021.022.363.770.531.261.901.324.601.320.8619.65
19170.310.541.752.816.170.130.480.200.130.950.100.4213.99
19180.681.180.722.982.031.282.540.573.621.100.781.3618.84
19190.000.321.491.650.881.107.460.950.881.312.070.5018.61
19201.221.390.584.071.611.870.682.550.732.430.720.8518.70
19210.110.310.774.811.503.621.532.000.171.130.981.4618.39
19220.630.590.813.321.020.621.041.50Tr 1.132.580.5613.80
1923Tr 1.712.291.293.474.442.462.680.845.430.400.8825.89
19240.330.361.771.982.77Tr 0.380.472.061.470.161.3313.08
19250.06Tr 0.350.251.611.862.101.832.244.720.991.1817.19
19260.720.652.693.053.220.551.332.030.410.950.331.9717.90
19270.220.472.663.461.723.472.391.261.290.860.950.6919.44
19280.071.712.721.555.482.841.340.660.231.782.090.0420.51
19290.360.732.571.601.501.754.062.611.791.701.890.6621.22
19300.640.600.880.992.171.022.853.810.360.651.330.6815.98
19310.001.811.591.603.672.181.070.530.200.710.850.0214.23
19320.331.061.472.011.101.081.551.170.101.000.420.5611.85
1933Tr 0.261.284.153.940.300.551.612.46Tr 0.401.1316.08
19340.101.931.632.823.111.900.240.211.020.000.840.2214.02
19350.080.510.142.807.040.800.331.091.401.460.780.0116.44
19360.240.382.881.252.752.850.993.731.862.710.250.3620.25
19370.340.580.832.012.313.910.820.910.690.580.442.1615.58
19380.600.592.594.424.382.823.311.325.210.682.131.0429.09
19390.830.881.681.941.740.840.270.940.690.990.050.2611.11
19401.541.111.582.052.570.831.871.475.500.600.750.4220.29
19411.120.292.924.082.071.532.512.542.223.130.710.8723.99
19421.191.850.936.941.803.220.571.661.166.040.410.4626.23
19430.100.331.191.364.851.172.333.08Tr 0.040.960.3415.75
19440.900.403.796.811.770.961.920.64Tr 0.450.330.6818.65
19451.260.661.074.123.862.052.353.860.691.460.610.6622.65
19461.000.180.710.893.551.331.512.191.322.173.680.1118.64
19470.571.162.661.344.354.070.831.370.723.741.230.6622.70
19482.500.703.322.001.242.351.110.320.951.100.980.5417.11
19491.660.172.542.173.697.401.160.360.261.52Tr 0.2921.22
19500.990.260.412.953.490.890.790.211.550.391.970.2614.16
19511.121.012.402.731.932.631.407.490.882.771.511.5427.41
19520.010.482.263.294.450.770.912.190.490.421.710.1717.15
19530.460.921.602.222.691.332.841.070.010.561.141.1716.01
19540.480.251.160.831.331.161.730.831.370.420.670.6810.91
19550.391.412.140.222.491.881.331.501.050.561.420.8615.25
19560.411.531.591.463.671.902.502.240.020.501.830.8018.45
19571.051.280.636.859.270.930.921.970.852.481.120.0827.43
19580.740.532.803.194.172.051.990.821.050.560.630.7519.28
19591.011.291.912.083.730.640.821.353.012.180.720.1118.85
19600.541.040.721.903.791.031.280.410.672.380.271.2715.30
19610.430.702.680.733.702.172.312.064.891.041.250.4322.39
19621.520.820.480.991.992.252.160.190.281.090.840.1612.77
19630.960.401.810.151.374.620.692.342.960.340.700.6116.95
19640.430.651.480.862.271.272.020.330.360.280.640.8811.47
19650.731.192.112.381.422.495.200.232.840.180.260.4419.47
19660.201.330.311.210.801.540.920.752.710.600.490.2711.13
19670.610.490.822.104.464.982.973.941.021.580.731.1924.89
19680.180.990.971.732.272.361.033.461.390.540.860.4116.19
19690.290.220.531.148.665.342.750.730.765.390.920.7927.52
19700.100.033.860.631.172.611.350.203.831.091.600.1816.65
19710.511.360.786.012.000.411.370.104.210.720.560.6618.69
19721.150.440.681.521.223.662.241.791.181.262.151.1418.43
19731.090.171.744.424.880.481.140.322.310.691.841.1320.21
19740.901.071.223.07Tr2.080.510.372.132.241.060.4615.11
19750.450.881.232.854.332.011.671.311.060.681.200.5718.24
19760.420.341.191.992.141.251.621.432.731.020.210.3214.66
19770.080.450.533.320.930.664.751.480.150.400.610.1313.49
19781.020.331.063.778.031.651.551.570.572.460.201.6123.82
19790.590.062.572.216.673.021.691.770.571.352.001.7024.20
19800.990.801.182.172.480.321.500.921.180.601.140.1713.45
19810.190.372.311.164.471.751.971.201.451.280.210.5516.91
19820.020.290.610.334.651.713.452.724.361.430.451.5221.54
19830.070.234.602.885.542.552.840.780.380.303.460.8824.51
19840.550.802.662.290.451.851.672.571.014.250.010.4318.54
19850.990.891.431.821.371.911.990.032.861.071.951.1317.44
19860.091.040.614.882.621.681.940.671.153.662.370.6421.35
19871.172.442.422.552.126.041.261.991.130.941.791.9725.82
19880.401.142.531.483.700.700.711.332.020.030.752.1616.95
19891.191.270.971.952.682.931.431.63*3.54*1.40*0.09*1.54*20.62
19901.04*1.32*4.552.161.730.394.231.131.840.961.600.7521.70
19911.050.150.432.412.903.593.112.081.210.933.300.0121.17
19920.67 Tr5.170.461.700.961.133.080.020.792.560.8417.38
19930.250.902.152.561.733.381.401.043.322.422.170.5521.87
19940.861.371.613.461.350.930.352.560.541.022.250.4916.79
19950.641.531.215.459.594.030.721.452.960.591.510.2529.93
19961.890.292.161.494.632.771.960.633.480.281.430.3721.38
19970.871.830.915.772.193.691.145.271.922.701.520.6828.49
19981.070.233.414.561.821.854.020.970.661.121.531.0522.29
19990.650.081.097.551.840.822.545.542.621.330.811.0125.87
20000.290.552.561.501.601.532.090.722.511.280.890.4415.96
20010.730.862.013.023.621.091.761.641.770.401.020.3618.28
20021.070.441.500.203.201.180.091.441.522.440.780.0213.88
20030.091.525.442.992.622.690.713.520.350.450.800.8422.12
20040.821.311.095.661.283.963.442.882.072.321.990.3527.17
20051.400.311.223.861.912.680.421.630.522.800.340.4317.42
20060.440.682.081.041.141.322.631.231.253.710.743.0519.31
20071.680.861.692.241.790.380.801.821.921.380.472.1017.13
20080.460.631.471.134.211.580.092.971.841.180.131.3317.02
2009 0.620.271.895.883.082.701.420.330.423.260.931.3922.19
2010 0.281.373.303.632.713.362.311.070.250.950.610.4820.32
20110.961.020.332.415.161.352.871.082.561.650.981.9222.29
20120.381.940.011.311.780.384.990.362.271.440.280.5115.65
20130.271.131.724.142.660.611.031.4018.162.240.290.534.15
20141.670.681.621.874.430.844.57

1971-2000 climatology
TypeJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR TOTAL
climo0.700.751.852.933.052.021.931.621.841.311.390.84 20.23
std0.430.581.231.682.191.311.061.261.190.950.900.55--

1961-1990 climatology
TypeJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR TOTAL
climo0.610.751.662.163.002.222.031.311.891.301.060.83 18.82
std0.420.521.161.342.161.471.151.001.331.220.800.56 --

1897-1994 climatology
TypeJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR TOTAL
climo0.730.781.682.542.981.881.851.551.521.491.020.77 18.61
std0.450.521.051.651.761.351.191.441.341.250.820.63

* Data not from standard site ** Data for 1893 probably from Longmont which has generally lower precip than Boulder Tr= Trace std= standard deviation Data was obtained from GCPS (1893-1990) and the local station report(1991-1995).

 

[Pages are for curiosity only; there are no guarantees that the data is correct.