Groundwater temperature is accurate to between ±0.1–1.0°C depend on site; differences are accurate to ±0.1°C. Temperature is depth-dependent. Therefore, temperatures at different depths are stored in separate data sets, which specify the measurement depth.

Precipitation is accurate to ±0.01 inches except during freezing periods (about December through early April). Rain gages are unheated and uncovered. Precipitation recorded during freezing periods can be caused by snow (previously accumulated in the rain gage) melting in the gage funnel during warm periods and does NOT represent actual precipitation at the time of recording. Precipitation recorded during freezing periods likely underestimates actual precipitation because the gage funnel may be full of snow (preventing further accumulation) or because snow in the funnel may sublimate or blow out instead of melting through the gage.