diff --git a/yr/yr.go b/yr/yr.go
index 292749b..b3fb070 100644
--- a/yr/yr.go
+++ b/yr/yr.go
@@ -66,9 +66,9 @@ func windDirection(d float64) string {
 
 type NowForecast struct {
 	nominatim.LookupResult
-	Temperature   float64 `json:"temperature"`
-	Percipitation float64 `json:"percipitation"`
-	Wind          wind    `json:"wind"`
+	Temperature   float64 `json:"temperature"`   // In celsius
+	Percipitation float64 `json:"percipitation"` // In mm
+	Wind          wind    `json:"wind"`          // In m/s
 }
 
 func (c *Client) Now(q string) (*NowForecast, error) {