| Monthly Observation SummaryFebruary 1999 | |||||||||||||
| 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 | 41 | 18 | 0.11 | 0.11 | 4.77 | 0.12 | 13 | 71 | 17:45 | 30.20 | 30.68 | 53 | 100 |
| 2 | 50 | 35 | 0.56 | 0.67 | 5.33 | 0.24 | 10 | 63 | 17:42 | 29.77 | 30.20 | 100 | 100 |
| 3 | 57 | 39 | 0.00 | 0.67 | 5.33 | 0.00 | 28 | 70 | 17:47 | 29.80 | 30.05 | 24 | 100 |
| 4 | 56 | 37 | 0.01 | 0.68 | 5.34 | 0.04 | 36 | 69 | 17:49 | 29.77 | 30.09 | 54 | 98 |
| 5 | 48 | 34 | 0.00 | 0.68 | 5.34 | 0.00 | 31 | 69 | 17:46 | 30.07 | 30.32 | 29 | 67 |
| 6 | 57 | 35 | 0.00 | 0.68 | 5.34 | 0.00 | 23 | 66 | 17:46 | 29.87 | 30.21 | 45 | 78 |
| 7 | 45 | 33 | 0.06 | 0.74 | 5.40 | 0.04 | 18 | 54 | 17:46 | 29.66 | 30.02 | 66 | 100 |
| 8 | 41 | 30 | 0.02 | 0.76 | 5.42 | 0.04 | 19 | 65 | 17:53 | 29.71 | 30.16 | 74 | 100 |
| 9 | 53 | 29 | 0.00 | 0.76 | 5.42 | 0.00 | 19 | 68 | 17:49 | 29.98 | 30.18 | 53 | 100 |
| 10 | 57 | 39 | 0.00 | 0.76 | 5.42 | 0.00 | 24 | 70 | 17:54 | 30.01 | 30.29 | 28 | 63 |
| 11 | 65 | 30 | 0.00 | 0.76 | 5.42 | 0.00 | 24 | 70 | 17:57 | 30.07 | 30.34 | 28 | 86 |
| 12 | 72 | 34 | 0.30 | 1.06 | 5.72 | 0.36 | 39 | 72 | 17:43 | 29.65 | 30.09 | 46 | 94 |
| 13 | 36 | 27 | 0.00 | 1.06 | 5.72 | 0.00 | 33 | 72 | 17:59 | 29.99 | 30.24 | 38 | 77 |
| 14 | 40 | 25 | 0.00 | 1.06 | 5.72 | 0.00 | 28 | 72 | 17:59 | 30.23 | 30.35 | 29 | 71 |
| 15 | 52 | 26 | 0.00 | 1.06 | 5.72 | 0.00 | 15 | 70 | 17:59 | 30.16 | 30.35 | 18 | 68 |
| 16 | 65 | 27 | 0.00 | 1.06 | 5.72 | 0.00 | 14 | 71 | 18:00 | 29.96 | 30.18 | 17 | 75 |
| 17 | 52 | 35 | 0.23 | 1.29 | 5.95 | 0.12 | 11 | 73 | 17:57 | 29.87 | 29.98 | 60 | 100 |
| 18 | 48 | 34 | 0.75 | 2.04 | 6.70 | 0.24 | 19 | 75 | 18:02 | 29.82 | 29.96 | 55 | 100 |
| 19 | 44 | 30 | 0.00 | 2.04 | 6.70 | 0.00 | 16 | 73 | 18:04 | 29.87 | 30.01 | 51 | 88 |
| 20 | 40 | 28 | 0.00 | 2.04 | 6.70 | 0.00 | 29 | 73 | 18:06 | 29.93 | 30.04 | 46 | 79 |
| 21 | 34 | 23 | 0.00 | 2.04 | 6.70 | 0.00 | 28 | 76 | 18:08 | 30.02 | 30.13 | 45 | 72 |
| 22 | 30 | 18 | 0.00 | 2.04 | 6.70 | 0.00 | 29 | 74 | 18:08 | 30.12 | 30.38 | 26 | 66 |
| 23 | 28 | 16 | 0.00 | 2.04 | 6.70 | 0.00 | 12 | 74 | 18:06 | 30.37 | 30.49 | 38 | 82 |
| 24 | 39 | 20 | 0.02 | 2.06 | 6.72 | 0.04 | 14 | 75 | 18:09 | 30.27 | 30.42 | 42 | 100 |
| 25 | 36 | 23 | 0.00 | 2.06 | 6.72 | 0.00 | 14 | 72 | 18:06 | 30.01 | 30.27 | 73 | 100 |
| 26 | 46 | 29 | 0.00 | 2.06 | 6.72 | 0.00 | 27 | 74 | 18:11 | 30.02 | 30.15 | 42 | 99 |
| 27 | 53 | 28 | 0.03 | 2.09 | 6.75 | 0.04 | 15 | 73 | 18:03 | 29.85 | 30.15 | 29 | 91 |
| 28 | 46 | 39 | 0.70 | 2.79 | 7.45 | 0.48 | 19 | 58 | 18:04 | 29.40 | 29.85 | 77 | 100 |
| Avg. | 47.5 | 29.3 | |||||||||||
| Max. | 72 | 0.75 | 0.48 | 39 | 76 | 30.68 | 100 | 100 | |||||
| Min. | 16 | 10 | 54 | 29.40 | 17 | 63 | |||||||