| Monthly Observation SummarySeptember 1997 | |||||||||||||
| 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 | 89 | 66 | 0.34 | 0.34 | 25.16 | 0.84 | 10 | 82 | 19:56 | 30.10 | 30.21 | 45 | 100 |
| 2 | 91 | 65 | 0.00 | 0.34 | 25.16 | 0.00 | 14 | 81 | 19:53 | 30.01 | 30.21 | 47 | 100 |
| 3 | 72 | 57 | 0.03 | 0.37 | 25.19 | 0.04 | 24 | 82 | 19:53 | 29.91 | 30.09 | 43 | 100 |
| 4 | 69 | 50 | 0.00 | 0.37 | 25.19 | 0.00 | 29 | 81 | 19:51 | 30.04 | 30.15 | 31 | 77 |
| 5 | 78 | 52 | 0.00 | 0.37 | 25.19 | 0.00 | 15 | 81 | 19:47 | 30.07 | 30.21 | 29 | 83 |
| 6 | 81 | 51 | 0.00 | 0.37 | 25.19 | 0.00 | 13 | 82 | 19:47 | 30.02 | 30.13 | 33 | 100 |
| 7 | 89 | 57 | 0.00 | 0.37 | 25.19 | 0.00 | 19 | 81 | 19:30 | 29.90 | 30.04 | 36 | 100 |
| 8 | 79 | 64 | 0.11 | 0.48 | 25.30 | 0.60 | 11 | 80 | 19:41 | 29.91 | 29.99 | 60 | 100 |
| 9 | 72 | 65 | 0.01 | 0.49 | 25.31 | 0.04 | 18 | 71 | 19:30 | 29.95 | 30.07 | 75 | 100 |
| 10 | 80 | 65 | 0.36 | 0.85 | 25.67 | 0.24 | 19 | 80 | 19:36 | 29.87 | 29.98 | 73 | 100 |
| 11 | 77 | 61 | 0.85 | 1.70 | 26.52 | 2.92 | 18 | 80 | 19:39 | 29.85 | 30.02 | 71 | 100 |
| 12 | 81 | 57 | 0.00 | 1.70 | 26.52 | 0.00 | 11 | 81 | 19:33 | 30.01 | 30.13 | 49 | 100 |
| 13 | 78 | 60 | 0.00 | 1.70 | 26.52 | 0.00 | 19 | 81 | 19:34 | 30.09 | 30.16 | 52 | 92 |
| 14 | 79 | 59 | 0.00 | 1.70 | 26.52 | 0.00 | 11 | 80 | 19:34 | 30.09 | 30.20 | 48 | 96 |
| 15 | 79 | 60 | 0.00 | 1.70 | 26.52 | 0.00 | 13 | 81 | 19:32 | 30.04 | 30.15 | 42 | 98 |
| 16 | 84 | 57 | 0.00 | 1.70 | 26.52 | 0.00 | 9 | 80 | 19:31 | 29.99 | 30.10 | 45 | 100 |
| 17 | 85 | 60 | 0.00 | 1.70 | 26.52 | 0.00 | 14 | 79 | 19:27 | 29.90 | 30.07 | 39 | 100 |
| 18 | 82 | 59 | 0.22 | 1.92 | 26.74 | 0.36 | 19 | 80 | 19:27 | 29.95 | 30.13 | 36 | 100 |
| 19 | 85 | 53 | 0.00 | 1.92 | 26.74 | 0.00 | 13 | 80 | 19:24 | 29.95 | 30.12 | 40 | 100 |
| 20 | 86 | 61 | 0.00 | 1.92 | 26.74 | 0.00 | 38 | 81 | 19:22 | 29.77 | 30.04 | 52 | 100 |
| 21 | 65 | 48 | 0.00 | 1.92 | 26.74 | 0.00 | 23 | 82 | 19:23 | 30.04 | 30.31 | 46 | 98 |
| 22 | 72 | 43 | 0.00 | 1.92 | 26.74 | 0.00 | 16 | 80 | 19:20 | 30.15 | 30.37 | 39 | 100 |
| 23 | 72 | 50 | 0.00 | 1.92 | 26.74 | 0.00 | 18 | 81 | 19:16 | 30.01 | 30.16 | 53 | 100 |
| 24 | 61 | 44 | 0.00 | 1.92 | 26.74 | 0.00 | 11 | 75 | 19:18 | 30.01 | 30.23 | 41 | 100 |
| 25 | 71 | 43 | 0.00 | 1.92 | 26.74 | 0.00 | 16 | 80 | 19:18 | 29.66 | 30.02 | 59 | 100 |
| 26 | 73 | 53 | 0.00 | 1.92 | 26.74 | 0.00 | 17 | 81 | 19:15 | 29.73 | 30.07 | 45 | 100 |
| 27 | 74 | 48 | 0.00 | 1.92 | 26.74 | 0.00 | 12 | 80 | 19:14 | 30.07 | 30.16 | 48 | 100 |
| 28 | 65 | 53 | 0.45 | 2.37 | 27.19 | 0.40 | 20 | 64 | 18:59 | 29.46 | 30.09 | 85 | 100 |
| 29 | 77 | 59 | 0.14 | 2.51 | 27.33 | 0.16 | 35 | 79 | 19:11 | 29.43 | 29.63 | 32 | 100 |
| 30 | 72 | 60 | 0.01 | 2.52 | 27.34 | 0.04 | 26 | 80 | 19:09 | 29.51 | 29.79 | 45 | 85 |
| Avg. | 77.3 | 56.0 | |||||||||||
| Max. | 91 | 0.85 | 2.92 | 38 | 82 | 30.37 | 85 | 100 | |||||
| Min. | 43 | 9 | 64 | 29.43 | 29 | 77 | |||||||