| Monthly Observation SummaryDecember 2001 | |||||||||||||
| Station "APLMD" (JHU/Applied Physics Laboratory), Laurel, MD (39°10'02"N, 76°53'52"W, 438 ft) | |||||||||||||
| Day | Max. Temp. | Min. Temp. | Rain Day | Rain Month | Rain Year | Max. Rn Rate | Peak Gust | Max. Light | Last Light | Min. Press. | Max. Press. | Min. RH | Max. RH |
| (°F) | (°F) | (in.) | (in.) | (in.) | (in./hr) | (mph) | (in.) | (in.) | (%) | (%) | |||
| 1 | 73 | 47 | 0.00 | 0.00 | 39.06 | 0.00 | 17 | 66 | 17:04 | 30.01 | 30.24 | 36 | 100 |
| 2 | 51 | 34 | 0.00 | 0.00 | 39.06 | 0.00 | 15 | 76 | 17:07 | 30.23 | 30.38 | 57 | 100 |
| 3 | 58 | 30 | 0.00 | 0.00 | 39.06 | 0.00 | 14 | 66 | 17:07 | 30.31 | 30.43 | 40 | 100 |
| 4 | 71 | 35 | 0.00 | 0.00 | 39.06 | 0.00 | 11 | 66 | 17:07 | 30.32 | 30.42 | 23 | 99 |
| 5 | 77 | 49 | 0.00 | 0.00 | 39.06 | 0.00 | 11 | 69 | 17:06 | 30.26 | 30.42 | 27 | 64 |
| 6 | 72 | 51 | 0.00 | 0.00 | 39.06 | 0.00 | 21 | 71 | 17:06 | 29.99 | 30.27 | 35 | 73 |
| 7 | 60 | 47 | 0.00 | 0.00 | 39.06 | 0.00 | 19 | 72 | 16:52 | 29.98 | 30.18 | 54 | 83 |
| 8 | 48 | 40 | 0.74 | 0.74 | 39.80 | 0.24 | 11 | 56 | 16:46 | 29.93 | 30.23 | 64 | 100 |
| 9 | 49 | 33 | 0.02 | 0.76 | 39.82 | 0.04 | 28 | 68 | 16:50 | 29.93 | 30.42 | 48 | 100 |
| 10 | 45 | 27 | 0.03 | 0.79 | 39.85 | 0.04 | 10 | 66 | 16:16 | 30.31 | 30.46 | 75 | 100 |
| 11 | 51 | 40 | 0.40 | 1.19 | 40.25 | 0.16 | 13 | 73 | 17:05 | 30.26 | 30.43 | 82 | 100 |
| 12 | 50 | 37 | 0.00 | 1.19 | 40.25 | 0.00 | 13 | 69 | 16:59 | 30.27 | 30.51 | 80 | 100 |
| 13 | 55 | 46 | 0.02 | 1.21 | 40.27 | 0.04 | 17 | 66 | 17:04 | 29.98 | 30.29 | 94 | 100 |
| 14 | 64 | 52 | 0.20 | 1.41 | 40.47 | 0.16 | 31 | 55 | 17:06 | 29.77 | 30.05 | 54 | 100 |
| 15 | 55 | 36 | 0.00 | 1.41 | 40.47 | 0.00 | 31 | 74 | 17:05 | 29.95 | 30.49 | 51 | 75 |
| 16 | 45 | 28 | 0.00 | 1.41 | 40.47 | 0.00 | 13 | 67 | 16:54 | 30.32 | 30.56 | 47 | 94 |
| 17 | 54 | 39 | 0.26 | 1.67 | 40.73 | 0.16 | 24 | 67 | 16:59 | 29.51 | 30.32 | 69 | 100 |
| 18 | 55 | 38 | 0.08 | 1.75 | 40.81 | 0.04 | 44 | 71 | 17:08 | 29.35 | 29.93 | 50 | 100 |
| 19 | 52 | 35 | 0.00 | 1.75 | 40.81 | 0.00 | 19 | 65 | 17:09 | 29.76 | 30.04 | 50 | 92 |
| 20 | 45 | 35 | 0.00 | 1.75 | 40.81 | 0.00 | 43 | 65 | XX:XX | 29.76 | 30.04 | 38 | 92 |
| 21 | 41 | 29 | 0.00 | 1.75 | 40.81 | 0.00 | 29 | 58 | 17:10 | 30.02 | 30.37 | 39 | 70 |
| 22 | 44 | 27 | 0.00 | 1.75 | 40.81 | 0.00 | 13 | 64 | 17:09 | 30.31 | 30.49 | 43 | 89 |
| 23 | 51 | 27 | 0.23 | 1.98 | 41.04 | 0.40 | 22 | 71 | 17:01 | 29.82 | 30.31 | 46 | 100 |
| 24 | 44 | 31 | 0.12 | 2.10 | 41.16 | 0.16 | 25 | 64 | 17:12 | 29.79 | 29.98 | 46 | 100 |
| 25 | 40 | 26 | 0.00 | 2.10 | 41.16 | 0.00 | 16 | 66 | 17:12 | 29.96 | 30.12 | 37 | 69 |
| 26 | 37 | 25 | 0.00 | 2.10 | 41.16 | 0.00 | 17 | 73 | 17:13 | 29.77 | 30.01 | 39 | 68 |
| 27 | 35 | 22 | 0.00 | 2.10 | 41.16 | 0.00 | 21 | 75 | 17:13 | 29.76 | 29.85 | 44 | 69 |
| 28 | 44 | 23 | 0.00 | 2.10 | 41.16 | 0.00 | 24 | 73 | 17:07 | 29.66 | 29.87 | 44 | 81 |
| 29 | 45 | 24 | 0.00 | 2.10 | 41.16 | 0.00 | 32 | 73 | 17:15 | 29.76 | 30.01 | 46 | 84 |
| 30 | 28 | 18 | 0.00 | 2.10 | 41.16 | 0.00 | 28 | 67 | 17:15 | 29.99 | 30.15 | 41 | 64 |
| 31 | 33 | 19 | 0.00 | 2.10 | 41.16 | 0.00 | 19 | 67 | 17:15 | 30.07 | 30.21 | 36 | 64 |
| Avg. | 50.7 | 33.9 | |||||||||||
| Max. | 77 | 0.74 | 0.40 | 44 | 76 | 30.56 | 94 | 100 | |||||
| Min. | 18 | 10 | 55 | 29.35 | 23 | 64 | |||||||