Hey Patrick,
You may not know the answer to this question, because it's mainly not a meteorological question, but, when I looked at today's airport observations at KISP, I noticed that the low temp was 66.2°F according the observations. However, according to the NWS, the low was rounded up to 67°F. I've always thought that the low gets rounded to the nearest degree, I don't understand why it would be rounded up in this case. The same thing also happened yesterday. Yesterday, the observations went down to 64.4°F, but the actual low was 65°F. I'm using this data from Wunderground. I noticed that on Wunderground, it has some observations between the standard 1-hour observations, those observations have the 66.2°F reading which would make the low 66°F vs. the NWS's 67°F low. I noticed that on
http://w1.weather.gov/data/obhistory/KISP.html it doesn't have the observations between the hour so the low would round 67°F. Are the observations between the hour considered invalid, because the NWS doesn't seem to take into consideration the in between hour observations.
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