User Guide for Time Series plots

Time Series - yearly average values over time

Yearly Average

• Months to include – Months included in each year’s average. Annual average is From: Jan & To: Dec. To show time series for a single month, set both equal to that month (e.g., From: June & To: June).

Choose what to plot

• Method to use – Choose between 3 options for statistics: 1) Mean (mean across all stations in the region), 2) Max (maximum individual station value in the region), and 3) Min (minimum individual station value in the region).

• Include trendline? – Toggle display of a linear trendline on the figure.

• Trendline years – Range of years over which to display trendline. Defaults to the full range of data shown.

Data quality - when examining historical climate data from individual stations, the number of stations recording data at any given time can have an impact on the data results that must be acknowledged 

• Number of days – Any month with fewer daily measurements than this value is excluded from the data shown in the figure.

• Number of months – Any year with fewer monthly measurements (based on “Number of days”) than this value is excluded from the data shown in the figure.

• Number of stations – Any year where the number of stations recording quality data (based on “Number of days” and “Number of months”) is less than this value is excluded from the data shown in the figure.