1 Rain season (all year): 1 January - 31 December; Rain season (Monsoon - NOT Monsoon "Season"): 15 June - 30 September (fixed by NWS - no longer relies on 3-day high DP duration).
5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).
6 Air Quality Index (AQI) data as provided by Arizona Department of Environmental Quality - data not available ~0000-0600 MST.
9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station's recorded maximum or a percentage of computed theoretical solar maximum using the station's location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.
10 Historical average only to day 14 of just the month of October for this station since 4/2006.
11 Historical average rain this season to day 14 of October for this station since 4/2006.
NWS Weather Forecast -
Outlook Columbus Day & Tonight
Columbus Day Sunny
NWS forecast: Sunny. High near 88, with temperatures falling to around 86 in the afternoon. South southeast wind 0 to 5 mph.
Tonight
Mostly Clear
NWS forecast: Mostly clear. Low around 64, with temperatures rising to around 66 overnight. North wind 0 to 5 mph.
The heat index combines air temperature and dew point in an attempt to determine the human-perceived equivalent temperature - how hot it feels. The human body normally cools itself by sweating, which evaporates and carries heat away from the body. However, when the relative humidity is high the evaporation rate is reduced, so heat is removed from the body at a lower rate causing it to retain more heat than it would in dry air.
