diff --git a/collector/timex.go b/collector/timex.go
index 6494726ef7..109b6be719 100644
--- a/collector/timex.go
+++ b/collector/timex.go
@@ -185,8 +185,15 @@ func (c *timexCollector) Update(ch chan<- prometheus.Metric) error {
 		divisor = microSeconds
 	}
 
+	offsetSec := float64(timex.Offset) / divisor
+	if offsetSec > 1.0 || offsetSec < -1.0 {
+		c.logger.Warn("Discarding unreasonable timex offset value",
+			"offset_seconds", offsetSec, "status", status)
+		offsetSec = 0
+	}
+
 	ch <- c.syncStatus.mustNewConstMetric(syncStatus)
-	ch <- c.offset.mustNewConstMetric(float64(timex.Offset) / divisor)
+	ch <- c.offset.mustNewConstMetric(offsetSec)
 	ch <- c.freq.mustNewConstMetric(1 + float64(timex.Freq)/ppm16frac)
 	ch <- c.maxerror.mustNewConstMetric(float64(timex.Maxerror) / microSeconds)
 	ch <- c.esterror.mustNewConstMetric(float64(timex.Esterror) / microSeconds)
diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 29c934f57b..01d04c7f8d 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -215,12 +215,16 @@
             expr: |||
               (
                 node_timex_offset_seconds{%(nodeExporterSelector)s} > 0.05
+              and
+                node_timex_offset_seconds{%(nodeExporterSelector)s} < 1.0
               and
                 deriv(node_timex_offset_seconds{%(nodeExporterSelector)s}[5m]) >= 0
               )
               or
               (
                 node_timex_offset_seconds{%(nodeExporterSelector)s} < -0.05
+              and
+                node_timex_offset_seconds{%(nodeExporterSelector)s} > -1.0
               and
                 deriv(node_timex_offset_seconds{%(nodeExporterSelector)s}[5m]) <= 0
               )